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                                                                                                   Gnome P. User Guide 

Set current date/time and recording parameters considering the recording conditions
(see 7.3.3). If you wish, enter (set) a PIN code to protect access to Gnome P settings
(see 7.3.2).

If necessary, attach external microphones (see 5.2).

Attention!

Before connecting the voice-recorder to a PC make  sure  that PC case is effectively

grounded. Connection to ground is strictly recommended if you intend to connect the voice-
recorder to a PC and external power supply and/or external signal source at the same time.

Attention!

 

It is not recommended to connect several voice-recorders Gnome P   to a PC at one

time. Before connecting second voice-recorder you should disconnect the first one.

6.3. Recording

6.3.1. Recording hints

To obtain high-quality audio recording we recommend you to follow these guidelines:

 

1. It is not advisable to perform audio recording while the voice-recorder is USB-con-

nected.

2. Use stereo recording without compression at 16 kHz sampling rate if possible. Ste-

reo recording provides speech intelligibility even in noisy conditions.

3. Mono recording allows you to record longer sound signals.
4. To prevent useful signal loss, use Voice Activation mode only if input signal level is

stable.

5. Place microphones as close to the useful signal (speech) source as possible and as

far from the acoustic and electromagnetic noise sources as possible. The closer the
microphones are placed to the acoustic signal (speech) source, the smaller is rever-
beration (echo) and the higher is the gain level and speech intelligibility.

6. External microphones are more sensitive and at the same time can be easily con-

cealed (under a jacket lapel, shirt collar, on the cuff). During stereo recording extern-
al microphones should be placed at least 15 cm from each other.

7. Try to place the microphones in such a way as to avoid vibration, impact and rubbing

against other surfaces.

8. Avoid   permanent   contact   of   the   voice-recorder   box   or   external   microphones   with

rough surfaces (such as table plate, car, concrete structures).

9. Note that if mono recording is enabled, only left channel data will be recorded.

10. To conceal the sound recording process and/or avoid record suppression by special

devices (HF generators) it is advisable to use the internal microphone.

6.3.2. Manual recording start/stop 

The recording process can be started/stopped both manually and automatically. To start

recording manually, set the switch on the recorder body  (N2 in Figure 5.1) or on the remote
control unit to the ON position. 

To stop the recording, set the switch to  the OFF position accordingly. 

 

6.3.3. Voice Activated recording 

To perform voice activated recording, first enable “Voice Activation” in the “Record set-

tings”  window of Sound Manager Gnome P software (see 7.3.3) and specify the required
VA start/stop threshold, then set the switch on the recorder body  (N2 in Figure 5.1) or on

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Summary of Contents for P H368-2

Page 1: ...Gnome P Portable digital stereo voice recorder User Guide Speech Technology Center Saint Petersburg ...

Page 2: ...Gnome P User Guide Dear Customer Thank you for purchasing this product For optimum performance and safety please read this instruction carefully 2 ...

Page 3: ...ry set 4 3 Technical data 5 4 Voice recorder protection 6 5 General information 7 6 Operating gnome P 10 7 Gnome P software 13 8 Operating conditions 23 9 Transportation and storage 23 10 Warranty and technical support 23 11 Registration certificate 24 3 ...

Page 4: ...gital media via a USB PC interface Playback of recordings and modification of recording parameters is possible only by means of a PC using special software Model STC H368 2 is equipped with 2 GB flash memory model STC H368 4 with 4 GB flash memory Gnome P may be optionally supplied with additional STC hard and software according to the user s requirements Use www speechpro com for detailed informa...

Page 5: ...x with 2x compression 1 max Total Harmonic Distortion for line input at 1kHz with 16 kHz sampling frequency without compression 0 01 max with 2x compression 1 max Automatic Gain Control range 0 42 dB Voice Activation range 1 60 dB Microphone Type Electret HF resistant Sensitivity 55 dB Noise floor 28 dB max Max operation time without battery re charge Record mode 37 hrs Stand by mode Timers 1 000 ...

Page 6: ...ansfer rate is up to 215 or 460 kB sec 4 VOICE RECORDER PROTECTION 4 1 Protection from unauthorized access To protect Gnome P from unauthorized access playback of recorded data and modific ation of voice recorder parameters are implemented only by means of dedicated software If desired the user can protect voice recorder parameters and recorded information with di gital PIN code it is recommended ...

Page 7: ...ERAL INFORMATION 5 1 Overview and structure Gnome P voice recorder is 75 3 48 7 12 9 mm in size The metal case is coated with either titanium nitride golden colour or epoxy black colour Voice recorder controls and connectors are indicated in Figure 5 1 For explanation see Table 5 1 Figure 5 1 Gnome P voice recorder viewed from different angles 7 ...

Page 8: ...r SET 1 and SET 2 see Figure 5 2 The both external microphones sets include two microphones 2 an 8 pin plug 1 for connecting to Gnome P and a voice recorder remote control unit 5 The left and right mi crophone cables are marked 3 The left channel microphone wire has darker marking The cable length is 1 m Each microphone is also supplied with a wire tab 4 for fastening it to buttons hooks etc only ...

Page 9: ...e P battery The voice recorder is powered by an integrated Li ion battery 750 900 mAh used in GSM phones Nokia Power consumption in active mode is 25 30 mA in Voice Activation mode with input amplifiers and VA amplifier enabled 3 mA Minimum power consumption 1 mA is achieved in timer and switch activated recording This mode of operation is also maintained when battery voltage drops below the criti...

Page 10: ...ed in an integrated nonvolatile 2GB or 4 GB NAND flash memory Even if the voice recorder is not powered all data is stored in its flash memory for up to 10 years All recordings can be erased from the voice recorder memory either manually or by means of the Sound Manager Gnome P software see 6 4 6 OPERATING GNOME P 6 1 Gnome P operational states Gnome P can be in one of the two operational states s...

Page 11: ...tromagnetic noise sources as possible The closer the microphones are placed to the acoustic signal speech source the smaller is rever beration echo and the higher is the gain level and speech intelligibility 6 External microphones are more sensitive and at the same time can be easily con cealed under a jacket lapel shirt collar on the cuff During stereo recording extern al microphones should be pl...

Page 12: ...will start recording only after the gain level exceeds the specified VA threshold within the pre set time period 6 3 5 Loop recording In the loop mode sound data are recorded into a specified flash memory segment Once this segment is full the older recordings will be deleted and replaced with new ones Loop length is specified as hh mm in the Record settings window see 7 3 3 Loop re cording can be ...

Page 13: ...voice recorder information serial number available memory size battery level etc Setting recording parameters recording format signal source gain level etc Viewing the list of available recordings and performing the standard set of operations with them playback deletion and copying to disk 7 2 Software installation and system requirements Most of the voice recorder functions are implemented by mea...

Page 14: ...ng ON switch only after closing Sound Manager Gnome P software 7 3 Using Sound Manager Gnome P software 7 3 1 Running the program Sound Manager Gnome P main window To run Gnome P software select its entry in the Start menu by default it is installed in the Speech Technology Center group Sound Manager Gnome P main window is shown in Figure 7 3 1 Figure 7 3 1 Sound Manager Gnome P main window The ma...

Page 15: ...er you may use the Recording From oldest command records list begins from oldest recordings or the Recording From newest command records list begins from newest recordings When all required recordings are loaded just press Cancel to stop loading Figure 7 3 2 Figure 7 3 2 Records list loading window The right part of the window is taken up by the Information group box containing the following voice...

Page 16: ...ode Confirm the new PIN code by entering it again Confirmation and press Save To remove PIN code protection leave the last two lines empty After a PIN code has been set all subsequent launches of the software will start with a PIN code prompt Figure 7 3 4 Figure 7 3 4 The PIN code window If the voice recorder is not connected to your PC or if you fail to enter the right PIN code access to Gnome P ...

Page 17: ...layed see Figure 7 3 6 Figure 7 3 6 Record settings window In the Signal source group box select signal source types for the right and left channel Stereo signal is recorded from both channels while for mono recording only the left channel is used The following signal source types can be selected none internal microphone external microphone line input In the Record parameters group box select the ...

Page 18: ...the desired loop length hours minutes Once the set time period has elapsed new data will be recor ded over previous recordings Thus regardless of the overall recording session duration the amount of actually recorded data will correspond to the specified loop length In the Local erase button group box the following functions can be assigned to the voice recorder erase button N7 in Figure 5 1 Use f...

Page 19: ...standard playback mode release the Loop button To play sound files stored on the hard drive use the button or the Recording Play from disk command Sound files are played the same way as recordings from the voice recorder memory Pressing the button or using the Service Player options command you may change player parameters such as AGC range noise cancelation mode microphone or telephone line noise...

Page 20: ...to write the recordings to Each recording will be saved as a separate wav file If the data were recorded using voice activation such recordings will be stored in one wav file2 while the pauses separating one recording from another will be filled with background noise Pause length can be either set by the user fixed or left as in the original recording real File creation date will correspond to dat...

Page 21: ...t Compression Copying time of 1 hour of recorded sound minutes 8000 Hz mono yes no 1 5 min 3 min stereo yes no 3 min 6 min 16000 Hz mono yes no 3 min 6 min stereo yes no 6 min 12 min 7 4 Verifying digital signature The recordings authentication is based on the standard Digital Signature Algorithm DSA For digital signature two different keys are generally used one for creating a signa ture private ...

Page 22: ...herwise you will see To verify signature by other means you should have a public key To generate a public key use the Service Public Keys command Figure 7 4 2 Public key generation window In the displayed window Figure 7 4 2 enter the serial number of the voice recorder used for recording or choose Current and press the Generate button In the Key group box the generated public key will appear For ...

Page 23: ...eration storage and transport for a period of 24 months from the date of sale During the warranty period the manufacturer is obliged to repair the devices at no charge Repair of devices disabled as a result of improper use storage and or transport as well as repair after the time of the guarantee has expired may be provided by the manufacturer according to a separate agreement Technical Support Ou...

Page 24: ... recorder Gnome P H368 4 serial number 0907 conforms to technical requirements and is declared suitable for use Adjustment conducted by Stamp place ________________ 2007 S A Sokolov subscription year month day full name Date of issue Stamp place ________________ 2007 T B Veis subscription year month day full name 01 090707 24 ...

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