Speech Technology STC-H476 User Manual Download Page 2

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Manufacturer retains the right to make amendments to the manual, connected with improve-

ment of the voice recorder design, without extra notification.

Amendments made will be published in new edition of the manual and at the company’s web

site: http://www.speechpro.ru

If you have any questions regarding the use of the voice recorder, please contact the company’s

technical support or the support of its regional dealers.

Technical support contacts:

Saint-Petersburg
Phone +7(812) 325-8848

Fax: +7(812) 327-9297

Moscow
Phone: +7(495) 661-7550

Fax: +7(495) 661-7517

Technical support email: [email protected]

Technical support at the company’s web site: http://www.speechpro.ru/support

For contact with the technical support please be ready to deliver the following information:

– Clear description of the problem;

– Device name and serial number;

– Type of computer and its configuration.

Summary of Contents for STC-H476

Page 1: ...Users Guide GNOME 7 0 Portable Digital Stereo Voice Recorder STC H476 User Guide ...

Page 2: ...please contact the company s technical support or the support of its regional dealers Technical support contacts Saint Petersburg Phone 7 812 325 8848 Fax 7 812 327 9297 Moscow Phone 7 495 661 7550 Fax 7 495 661 7517 Technical support email support speechpro com Technical support at the company s web site http www speechpro ru support For contact with the technical support please be ready to deliv...

Page 3: ...RTING MEMORY CARD 9 INSERTING BATTERIES 9 CONNECTING THE RECORDER TO EXTERNAL DEVICES 10 CONTROLS 11 SWITCHING ON AND OFF 12 SWITCHING THE VOICE RECORDER ON 12 SWITCHING THE VOICE RECORDER OFF 12 RECOMMENDATIONS FOR THE BATTERY USE 12 DISPLAY STATUS INDICATION 13 DISPLAY VIEW WHEN RECORDER IS ON 13 1st SCREEN LINE 14 2nd SCREEN LINE 15 3d 4th SCREEN LINES 15 5th SCREEN LINE 15 6th 8th SCREEN LINES...

Page 4: ...ER MANAGER 51 MAIN WINDOW 51 RECORD OPTIONS SETUP 53 DATE AND TIME SETUP 55 TIMER SETUP 56 CHANGING PIN 57 INTERNAL PROGRAM UPDATE 58 FILE MANAGER WINDOW 59 CONVERSION INTO MP3 FORMAT 60 FILE SIGNATURE 61 DIGITAL SIGNATURE VERIFICATION 62 PRIVATE KEYS EXPORT 64 PRIVATE KEYS IMPORT 65 PUBLIC KEY EXPORT 66 ABOUT PROGRAM 66 EXIT PROGRAM 66 DELIVERY SET 67 Base Case Business 67 Extended Case Professio...

Page 5: ...portant information that helps you make better use of the product Caution Informs you about potential problems with hardware or software Warning Warns you about serious problems in a certain situation and tells you how to avoid it TRADEMARKS The names Windows Windows XP and Windows 7 are trademarks of Microsoft Corporation Logotypes and mark memory cards SecureDigital SD and SDHC Secure Digi tal H...

Page 6: ...t preliminary preparation speech record ing during investigative actions business negotiations lectures judicial sessions meetings interviews and etc both inside and outside You can find the voice recorder s appearance on the figure 1 Figure 1 Appearance of the voice recorder ABOUT THE PRODUCT Name Portable digital stereo voice recorder Gnome 7 0 Label STC H476 Producer Speech technology center Lt...

Page 7: ...input a lossless format without compression with nominal signal level at 1000 Hz dB no less than 90 Signal to noise ratio if using the microphone input without compression with nominal signal level at 1000 Hz dB no less than 72 Dynamic range of the recorded signals If the AGC is on without compression dB not less than 90 Built in microphones 2 Microphone type electret Built in microphone susceptib...

Page 8: ... can be used different sources two accumulator bat teries LR03 of ААА size non recoverable power element external source of direct current or a USB port for connecting to a computer CONTROLLING AND DISPLAYING FUNCTIONS The voice recorder has the following controlling and displaying functions Controlling the audio recording process with the RECORD STOP switch and buttons Switching on and off Holdin...

Page 9: ... Additional recording functions Effective automatic recording level adjustment in left and right channels Automatic power saving display mode Automatic menu locking when the recording starts 3 Recording list view and its playback p 42 4 While playing back the following functions are available p 42 Noise cancellation Changing the playback speed Adjusting volume in every channel separately Setting t...

Page 10: ...e continuous recording duration with PCM 16 kHz stereo and free memory internal and microSD space available is about 30 hours For convenience of preliminary planning of sound recording the recording duration for various modes and sample rates are the table below Calculation is provided for 4 GB of memory Mode Recording duration hrs Sampling rate 16 kHz 8 kHz μ law 8 bit mono 72 5 145 μ law 8 bit s...

Page 11: ...the edge of the card to fix it in the slot Close the protective shield To extract a memory card from the voice recorder Open the protective shield Press the edge of the card and carefully extract it from the slot Close the protective cover INSERTING BATTERIES The slot for batteries is located at the back panel of the voice re corder and is covered with a protective cover To install the batteries O...

Page 12: ...eedle jack for microphone garniture line input cable or adaptor for recording from telephone line Variants of connecting the voice recorder to various devices are shown below Connection to a Computer Connection to audio equipment External micro phone connection Phone line connection USB jack IN jack External microphones OUT jack Headphone connection Phone line adaptor Line input cable USB cable АM...

Page 13: ...of editable parameters and files recorded 1 Open list of recorded files 2 Exit list of recorded files boxes of selection and adjustment of voice recorder parameters 1 Tape source monitor on 2 Switch on noise cancellation and oth er functions while playing 3 Help 4 PIN code tampler proofing or saving 5 Delete selected phonogram 1 Volume up 2 Move up in the boxes of selection and adjustment of voice...

Page 14: ...ssible only through main window p 13 The voice recorder switching off is accompanied with the message RECOMMENDATIONS FOR THE BATTERY USE Ni MH and Ni Cd batteries are prone to memory effect that is a decline in its effective capacity when the battery is not fully discharged So you are not recommended to fully discharge the battery If the battery capacity has already reduced you can restore it by ...

Page 15: ...onnection Noise cancellation End to end channel Current file name Recording format Internal left channel microphone External left channel microphones Left channel signal level Automatic adjustment of the left channel signal level Timer indicator PIN USB connection indicator Battery indicator Time RECORDER Mode Button guide display Automatic adjustment of the right channel signal level Right channe...

Page 16: ...ator Description No timer is set At least one timer is on and active PIN code Indicator Description PIN code protection is off PIN code protection is on Battery status Indicator Description The USB charge is off for alkaline power elements The USB charge is on for batteries The indicator will blink at the rate of 1 Hz changing from yellow to red showing a critically low charge level the recording ...

Page 17: ... law u law While recording there is a signal format indicator set for recording While playing there is a format of the signal being played Recording mode Indicator Description mono stereo Only left channel is on a single channel format for wav files Both channels are on a double channel file format of wav files Sample rate Indicator Description 8000 11025 16000 22050 32000 44100 48000 96000 Sample...

Page 18: ...or External microphones connection Indicator Description The external microphone id not connected The microphone is connected Depending on the channel there are additional markers 1 for the first channel or 2 for the second channel Indicators for external microphones are in the 7th line with the ExtMic indicator Line input connection Indicator Description Line input is not connected Line input is ...

Page 19: ...e is off The Loop mode is on Acoustic start mode indicator Indicator Description The Voice activity mode is off The Voice activity mode is on The voice recorder is in the stand by paused mode or the Voice activity mode is on Also there should be such conditions as a Internal or external recording switch is in ON position b At least one timer is on and active 11th SCREEN LINE or The 11th line displ...

Page 20: ...e recorder off as shown on p 12 If you remove the memory card while recording you may lose all the data Recording started with the switch may not start if Voice activation mode is on which level of starting is too high Correct the starting level of Voice activation mode taking into consideration the level of signal recorded For energy saving the voice recorder screen will be down if the control bu...

Page 21: ...ile and will continue recording Also when re recording in the already existing file the voice recorder will set the necessary parameters that are specific for this file For changing special file name format perform the following actions Switch the voice recorder on as described on p 12 Select of the file name format Press the button once The Settings screen will appear on the display with setting ...

Page 22: ...digit Next 11111112 Using the and buttons select the necessary value for other digits of the eight digit number Press the button to save the selected value of the eight digit number for ex ample Next 11111112 Press the button to exit the file name format editing If the file name format has been changed the Save message will appear With the or button select the necessary answer Choose Yes to confir...

Page 23: ... AGC Left AGC left channel mode switching on AGC Right AGC right channel mode switching on Format recording format setting In the Record setting screen with the or button select parameter Format PCM16 To change the selected by default parameter Format press the button With the or button select necessary item of Format parameter from follow ing list PCM24 PCM16 А low u low for example Format PCM24 ...

Page 24: ...In the Inputs screen with the or button select sound source which will be recorded in the left channel for example Int mic on Ext mic 1 off Ext mic 2 off Line 1 off Line2 off Press the button With the or button select necessary item of parameter Int mic on or Int mic off To apply the selected value of the parameter press the button To return to the Recording settings screen press the button If the...

Page 25: ...tion have priority over the autodetect For example after switching the voice recorder off and disconnecting the autodetected device external headphones Ln in cable then when you switch on the voice recorder again there will be available the audio signal source that you have connected before the activation of the Autodetection mode AGC Left and AGC Right AGC mode switching on In the Record settings...

Page 26: ...r Choose Yes to confirm changes Choose No to exit the Settings screen without saving changes This screen does not extend to right and left inputs because its changes were confirmed and saved earlier during to transition from the Inputs screen to the Record Settings screen For confirmation of the choice press the button The Settings screen will appear on screen again To exit the Settings screen pre...

Page 27: ... the Timers submenu with the or button select one of the timers for example Timer 1 off To enter the submenu of the selected timer Timer 1 setting press the button Timer setting The Timer 1submenu contains five commands Enable timer switching on and off Length hhh mm recording duration setting Period timer switching on periodicity setting Timer priority timer switching on priority setting Start ti...

Page 28: ...set the record duration in minutes from 0 to 59 minutes for example minute 30 Press the button To exit the Length submenu press the button If the start time parameters have been changed the Save message will appear With the or button select the necessary answer Choose Yes to confirm changes Choose No to cancel changes For confirmation of the choice press the button The Timers 1screen will appear o...

Page 29: ... confirmation of the choice press the button The Timers 1 screen will appear on screen again Timer priority timer switching on priority setting In the screen Timers 1 with the or button select menu item timer priority Timer priority off To change the selected Timer priority parameter press the button With the or buttons select the necessary value of parameter Timer priority on or Timer priority of...

Page 30: ...lect menu item minute minute 6 Press the button With the or button select the necessary value for the minute minute 100 The value set in the range from 0 to 59 minutes Press the button With the or button select menu item sec sec 39 The value set in the range from 0 to 59 seconds Press the button With the or button select the necessary value for the second for example sec 450 Press the button For s...

Page 31: ...he Timers submenu with the or button select next timer Press the button Adjust the selected timer parameters in the same manner as described for the Timers 1 timer Exit the Timers submenu After setting of the other timer parameters press the button The Settings screen will appear on screen To exit the Settings screen press the button The main window will appear on screen see DISPLAY VIEW WHEN RECO...

Page 32: ...ands Enable Loop recording mode switching on and off Length min Loop recording mode duration setting Information about maximum recording duration in Loop mode in minutes displays at screen line Max length min 186 Enable Loop recording mode switching on and off In the Loop screen with the or button select menu item Enable on or Enable off Press the button With the or button select the necessary val...

Page 33: ...rm changes Choose No to cancel changes For confirmation of the choice press the button The Settings screen will appear on screen again To exit the Settings screen press the button The main window will appear on screen see DISPLAY VIEW WHEN RECORDER IS ON p 13 In the lower left hand corner of the voice recorder screen the indicator of the Loop recording mode will change its colour from dark blue of...

Page 34: ...menu contains three commands Enable Voice activity recording mode switching on and off Delay Voice activity recording mode delay time setting Level Voice activity threshold value setting Indicator displays current signal level at the select ed input Enable Voice activity recording mode switching on and off In the Voice Activity submenu with the or button select menu item Enable on or Enable off Pr...

Page 35: ...ngs screen press the button The main window will appear on screen see DISPLAY VIEW WHEN RECORDER IS ON p 13 In the lower left hand corner of the voice recorder screen the indicator of the Voice activity recording mode will change its colour from dark blue off to yellow on Recording with using of the Voice activity mode Switch recording on by moving switch on the right side panel of the voice re co...

Page 36: ...d memory Maximum recording duration in days hours and minutes is shown to preset recording parameters Type memory type changing In the Memory submenu with the or button select menu item Type SD card or Type Internal Press the button With the or button select the necessary variant Type SD card or Type Internal Press the button Changing of the memory type does not require additional confirmation To ...

Page 37: ...Choose No to return to the Memory submenu For confirmation of the choice press the button Lock SD card locking Memory locking is used for memory cards only and is used to pro tect memory contents from reading and copying in other devices In the Memory submenu with the or button select the Lock menu item and press the button With the or button select the necessary variant 1 Lock on to lock 2 Lock o...

Page 38: ...ress the button To exit the Memory submenu press the button With the or button select the value to the first digit of the PIN from range 0 9 With the or button select the next digit of the PIN and with the or button set its value Enter the necessary number of the PIN digit from 1 to 8 When you have entered the digits press the button For applying entered PIN press the button If PIN is correct the ...

Page 39: ...e the OLD PIN code screen will appear To enter the PIN entering mode press the button In the OLD PIN code screen use the and buttons to set the current PIN value see PIN code entering Press the button In the NEW PIN code screen use the and buttons to set the current value of the PIN Press the button For saving of the new PIN press the button After saving PIN the message will appear saved PIN code ...

Page 40: ...nth and day and three command of time setting hour minute and second Date setting With the or button select menu item year year 2011 Press the button With the or button set the value for the year year 2012 The year shall be set in the range from 2000 to 2099 Press the button With the or button select menu item month month Sep Press the button With the or button select the value for the month from ...

Page 41: ...button With the or button set the value for the seconds for example sec 45 The value set in the range from 0 to 59 seconds Press the button To exit the Date Time submenu press the button If the date and time parameters have been changed the Save message will ap pear With the or button select the necessary answer Choose Yes to confirm formatting Choose No to return to the Date Time submenu For conf...

Page 42: ... commands Language interface language changing Backlight backlight duration setting for record and other modes Language interface language changing In the Miscellaneous submenu with the or button select the Language english menu item Press the button With the or button select Language russian or Language english Press the button Operation of the interface language changing does not require confirm...

Page 43: ...ct menu item of the backlight duration setting in seconds OFF delay sec 10 Press the button With the or button set the necessary value of the backlight duration in the range from 10 to 120 seconds for example OFF delay sec 30 Press the button To exit the Backlight RM submenu press the button If the backlight duration settings have been changed the Save message will appear With the or button select...

Page 44: ...empty file selection function records is not available Press the top left button which performs a file list display function The folder list will appear on the screen in the following format YY MM DD With the and button select the necessary folder and press the button Selecting Audio File The file list will appear on the screen in the following format FILE_NAME WAV Files can have the following att...

Page 45: ...nt audio file will be stopped Fast Forward Rewind While playing a file press or to establish the speed for re winding or forwarding You can choose among the following possible speeds х02 х04 х08 х16 х32 х64 To playing the file again press the button Voice Activity Detection VAD During the playback there is a possibility to activate the VAD Voice Activity Detection function Press and hold the butto...

Page 46: ... cancel the continuous playback you need to clear the time tags Press the to stop the playback Then press the button to set a new start time tag on the current position The tag colour will become green Press the button again to delete the previous start time tag Then press the button to set a new end time tag on the current position The tag colour will become green Press the button again to delete...

Page 47: ...The current play speed will be displayed You cannot change the playback speed for audio files with PCM 24 bits sampling rate higher than 16 kHz and compressed by A law or µ law Press the or button to set the playback speed You can choose among the following values relative to the normal speed of 100 50 57 67 75 87 off 100 114 133 150 175 200 If you cannot apply this function to the current audio f...

Page 48: ...utton to select a necessary folder and press the button Selecting and Deleting File Press the or button to select a file for deleting Press the button Then you ll have to confirm your action Use the or button to confirm or cancel your action Select yes to confirm the action Select yes to cancel the action Press the button The list of files without the deleted recording will be displayed if previou...

Page 49: ...ings To see information about the device press the button under About Name designation and serial number of the voice recorder and the software versions will be displayed on the screen FW The default voice recorder s firmware that can be changed by the user with the recorder control program HW Hardware board version PLD Programmable Logic Device firmware You ll need this information when applying ...

Page 50: ...recorder is not protected by PIN code Before drives installation make sure that the voice recorder is not protected by PIN code In the Update Driver Software window select Browse my computer for driver software fig 2 Figure 2 The window Update Driver Software Figure 3 Choosing a folder to locate the INF file In the Update Driver Software window fig 3 Click the Browse button in the dialog box selec...

Page 51: ...omplete fig 6 Figure 7 Installation complete window Press the Close button fig 7 at the installation complete window When procedure of the new device identification will completed voice recorder will appear on the PC as removable disk fig 8 Figure 8 The voice recorder connected to PC The Removable Disk contains service files and a folder with audio files Fig 9 Figure 9 Content of the recorder s re...

Page 52: ...nager enu exe and click it twice with the left mouse button fig 10 Figure 10 Launching voice recorder Manager To make the work with the program more convenient it is recommended to create a shortcut on the desktop and launch the program by the double click of the mouse over the shortcut fig 11 Figure 11 Launching the program with the help of the shortcut on the desktop Copy the library lame_enc dl...

Page 53: ...mware version of connected digital voice recorder Battery status of connected digital voice recorder Current date of connected digital voice recorder Current time of connected digital voice recorder The bottom part of the window has the buttons as follows Opens the information window containing brief data on program see ABOUT PROGRAM Exits the program and closes the main window see EXIT PROGRAM Th...

Page 54: ...he voice recorder see CHANGING PIN Opens the Select firmware file window see fig 18 INTERNAL PROGRAM UPDATE to state the address of firmware file Opens the File Manager window where the standard set of operations with files recorded to the memory card and PC s hard drive are performed see FILE MANAGER WINDOW Opens the Select the audio file window see fig 22 CONVERSION INTO MP3 FORMAT to select the...

Page 55: ...ct the Manual adjustment checkbox in the Record level area and use the Level dB slider to set the required record level In order to set the separate control of record level in the left and right channels select the Separate control checkbox and use the sliders to set your record level in each channel Select in the dropdown lists of the Format field as follows Sample format PCM 16 bit PCM 24 bit µ ...

Page 56: ...o checkbox is selected there will be only mono record with the use of source of the left channel only To use the voice activity detection on the Voice activity area Select the Use voice activity detection box Use the Threshold dB slider to set the threshold of voice ac tivity In the Delay box click the button to set the delay value for record cut in seconds after decreasing of signal level lower t...

Page 57: ...e date month and the year by clicking them by the left mouse button the respective value will be highlighted in blue and by typing new values using the numbers in the keyboard Set the required time in the field Time In order to do that Click the numbers of hours minutes or seconds by the left mouse button the numbers will be highlighted in blue Click the button to set the required value To acceler...

Page 58: ...r settings Click the line of respective timer in the Timers window with the left mouse but ton and click the Setup button Select the required settings in the Timer Setup window fig 16 After setting all timer parameters click the Ok button Click the Cancel button to close the Timers window without any changes In order to start the timer Select the Timer on checkbox Select the required date in the d...

Page 59: ...e PIN button in the main window of the program fig 12 Proceed as follows in the Change PIN window fig 17 Type the current PIN in the Current PIN field Type new PIN in the New PIN field Type new PIN in the Confirm new PIN field Click Ok to apply new PIN Click the Cancel button to exit the Change PIN window ...

Page 60: ...e file Select the firmware file Click the Open button Figure 19 Firmware update process The firmware update process takes certain time and powered by the Firmware update window fig 19 Figure 20 Firmware successfully completed The following message will appear if the firmware update is successful fig 20 You are not recommended to update the firmware when the voice recorder is connected to the compu...

Page 61: ...Icon Context menu Result Up Moves you up to the previous level of the folder tree within one logi cal disk Refresh Refresh the current folder Select folder Opens the Browse for folders dialog box Repair Becomes available when found an audio file with the header error oc curred at power off while recording Move Becomes available when you select one or more files and opens the Browse for files dialo...

Page 62: ...Figure 23 The Encoding setup window Select the required encoding options in Encoding window fig 23 and click the Begin button If the operation is performed successful ly the File is encoded message will ap pear The library lame_enc dll should be situated in the directory on your hard drive where the recorder manager is installed it is necessary for the conversion of audio files from wav format to ...

Page 63: ...e file to save the signature in the following window fig 25 Figure 25 Selecting file to save the signature Select or create a folder for saving the signature file State the name of the file to save the signature in the File name field Click the Save button To avoid confusion in the future it is advisable to use the place of storage and file name for sav ing the signature proposed by the program by...

Page 64: ... the window Find the audio file to sign in the explorer window click it by the left mouse button and click the Open button fig 28 Figure 28 Selection of audio file to check After selection of audio file in the Signature File field the path to the signature file will be writ ten in automatically set by the program by default If while signing the selected audio file the place of storage of signature...

Page 65: ...audio file is not changed and the digital signature thereto is selected right the message of au thenticity of the checked audio file will appear fig 31 Figure 32 Error message If the selected audio file and signature file do not match the message of error will appear fig 32 Figure 33 Message of changes in the checked audio file If the selected audio file is changed the mes sage on change of the ch...

Page 66: ... shall be typed in the Export Private Key window fig 34 To go on with the export of the private key click OK Figure 35 Error message If the password and its confirmation do not coincide the error message will appear fig 35 If the confirmation of the password is correct the window where you need to indicate a file for saving the key fig 36 will appear Figure 36 The Specify a file to save key window...

Page 67: ...e 38 Selection of private key file Figure 39 The Import Private Key window Type the password in the Import Private Key window and click OK fig 39 To cancel the import of private key click the Cancel button in the window see fig 38 or in the Import Pri vate Key window fig 39 Figure 40 Message of private key import If the entered password is correct the message of pri vate key import will appear fig...

Page 68: ...ect or create a folder for storage of exported public key in this window State the file name to save the key in the File name field Click the Save button To cancel the export of public key click the Cancel button Figure 43 Message of key writing to the file If all actions are done correct ly the message stating that the key is written to the stat ed file fig 43 will appear ABOUT PROGRAM Figure 44 ...

Page 69: ...03 6 Headset of two microphones and remote control with cable 0 8 m 7 General purpose USB charger for 220V 8 Midget headphones 9 The recorder s cradle 10 Package box Optional Equipment and Software 1 Line in stereo cable for the recorder 0 8 m 2 AC DC charger 220V 5V with USB jack 3 microSD card 8 GB 4 mini USB connection cable 5 Telephone adapter STC H310 01 6 External microSD reader USB connecti...

Page 70: ...f delivery During the warranty period the manufacturer repairs or replaces the spare parts free of charge provided that the user has observed the proper use storage and or transportation of the device The guarantee does not apply to the batteries In case any defects during the warranty period the warrant claims are accepted to the following address Russia St Petersburg 196084 PO box 515 Tel 812 32...

Page 71: ...____ conforms to technical requirements and is declared suitable for use Adjustment conducted by Stamp ___________________ ____________________ Subscription full name ____________________ day month year Date of issue ____________________ ____________________ _________________ day month year Subscription full name Components of the set and device serial numbers ...

Page 72: ...MEMO 05 01 03 2012 ...

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