24 32 Bit Digital Compressor Module
User's Manual
LTO
R
www.alto proaudio.com
Version 1.0 April 2002
English
Comp
ON OFF
Страница 1: ...24 32 Bit Digital Compressor Module User s Manual LTO R R www alto proaudio com Version 1 0 April 2002 English English Comp ON OFF ...
Страница 2: ... long periods of time External Connection The external wiring connected to the output hazardous live terminals requires installation by an instructed person or the use of ready made leads or cords Do not Remove any Cover There are maybe some areas with high voltages inside to reduce the risk of electric shock do not remove any cover if the power supply is connected The cover should be removed by t...
Страница 3: ...t consult an elec trician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Cleaning When the apparatus needs a cleaning you can blow off dust from the apparatus with a blower or clean with rag etc Don t use solvents such as benzol alcohol or other fluids with ...
Страница 4: ...e our products and we will create the new ones From our side we guarantee you and we will guarantee you also in future the best quality the best fruits of our continuous researches and the best prices Our LTO Comp is the result of many hours oflistening and tests involving common people area experts musicians and technicians Nothing else to add but that we would like to thank all the people that m...
Страница 5: ...g Inputs Outputs b Compressor Bypass Pedal Input c Power Connector 4 Installation Connection 8 4 1 Audio Connections and Power Up a Audio Connections b Power Up Setting 4 2 Analog a Input Jack Wiring b Levels Setting c Compression Process Bypass 4 3 Installation a Standard Use b Application Examples Line Instrument Mixer 4 4 Rackmount 5 Preset Functions Descriptions 12 5 1 Stereo AGC 5 2 Dynamic C...
Страница 6: ...ions 18 6 1 Block Diagram 6 2 Specifications 7 Warranty 20 a classic 1 b classic 2 c classic 3 d classic 4 5 6 Mono 2 Bands 5 Bands Eq Compressor Presets 5 4 Stereo 2 Bands Compressor Presets a agc pure b acoustic c master d clean e dance f kick drum g mixdown h jumping up 5 5 Mono 2 Bands 5 Bands Eq Compressor ...
Страница 7: ...thms may change quite heavily the colour and the phase of the input signal so as the balance between low and high frequencies of the signal itself All the algorithms are based on classical algorithms for the dynamic compression of audio signals modified and optimized thanks to the experience of LTO AUDIO TEAM researchers 2 Feature List Robust and Compact design 24 32 bits Digital Audio Processor M...
Страница 8: ...elections Program Select Knob The Program Select Knob is used to choose the program you wish to perform Variations Select Knob Each program on this apparatus has the AGC parameter which can be adjusted by means of this knob a Analog Inputs Outputs Inputs These are 1 4 unbalanced phone jacks which connect to sources such as Channel inserts of a mixing console They may be used with Line input levels...
Страница 9: ...either normally open or normally closed When the footswitch is in the state of OFF the function will be Compressor On the other hand when the footswitch is in the state of ON the function will be Bypass c Power Connector Power connector This is a plug for connecting the 9VAC power supply adapter provided by the manufacturer 4 Installation Connection 4 1 Audio Connections and Power Up a Audio Conne...
Страница 10: ...decrease thepossibility of overload distortion andkeep the amount of background noise to aminimum c Compression Process Bypass At any time you can bypass the process there by allowing the direct signal to pass also routed automatically to the RIGHT INPUT However if we are using stereo input signals connecting a cable to the RIGHT INPUT jack the automatic routing will be avoided and the LEFT INPUT ...
Страница 11: ... the LEFTand RIGHT outputs of the Comp to a stereo amplification system or two mixer inputs 10 b Application Examples line instrument STEREO Connect two audio cables to the LEFT and RIGHT INPUTS of the Comp from a stereo source and two other audio cables cords from the LEFT and RIGHT OUTPUTS of the Comp to a stereo amplification system or two mixer inputs SIGNAL OUTPUT INPUT 243 2 bit Digital Comp...
Страница 12: ... Insert jacks on the back of a mixer provide a way of inserting external processing equipment into the signal path The insert occurs after the input amplifier and before the channel fader essentially it is the same as connecting the source instrument or mic into the Comp before the mixer s channel input Usually insert connections require a special stereo splitting Y cord to be connected known as T...
Страница 13: ...of the Comp to an adjacent mixer input STEREO IN STEREO OUT This connection is similar to the one described above However by utilizing two TRS and console channel inserts we can process a couple of signals or a stereo signal coming ie This operation mode is the one used with the algorithms from 1 to 8 designed from a keyboard to process audio stereo sources as CD Improper level setting when using ...
Страница 14: ...Fagc value is increasing while in the compression area the COEF agc value is decreasing As the name implies compression reducesthe dynamic range ofa signal It is used extensively in audio recording production work noise reduction and live performance applications but it does need to be used with care A compressor is basically a variable gain device where the amount of gain used depends on the leve...
Страница 15: ...and and after once recrea ted the full band apply a powerful stereo dynamic process on the two recombined channels 14 A compressor s input output relationship is often described by a simple graph The horizontal axis corresponds tothe input signal level and the vertical axis is the output level both measured in decibels A line at 45 degrees corresponds to a gain of one any input level is mapped to ...
Страница 16: ...d so the unique appreciable differences are in the dynamic range corrections variations 2 through 16 activate even the AGC to help compressor action d Clean This is a high definition preset giving great brilliance anddynamic impression Nevertheless it is never fatiguing and pushes the sound without unbalancing it Highs in good evidence punch range in good evidence too lows not too attenuated Good ...
Страница 17: ...operating a dynamic process on sound signal Once splitted the input signal in 2 sub bands Comp operates a first separate limiting process on thelow frequencies band and onthe mid high frequencies and after once recreated the full band applies a powerful stereo dynamic processor on the recombined channel The input signal to the dynamic compression block is the sum of the inp ut signals filtered wit...
Страница 18: ...R dB CMP THR dB THR HOLD dB EXP RATIO In Out AGC 1 3 5 23 61 26 44 1 2 AGC 2 3 5 19 5 34 29 32 1 2 AGC 3 3 5 19 5 42 26 38 1 2 AGC 4 4 24 34 29 31 1 2 AGC 5 3 2 24 44 29 31 1 2 AGC 6 3 3 22 5 44 29 42 1 2 AGC 7 3 2 24 3 37 29 33 1 2 AGC 8 4 1 23 37 22 31 1 2 AGC 9 4 1 23 37 27 31 1 2 AGC 10 4 5 24 3 37 27 30 1 2 AGC 11 4 5 22 5 44 27 29 1 2 AGC 12 5 6 24 44 27 42 1 2 AGC 13 6 19 5 42 27 31 1 2 AGC...
Страница 19: ...5 G 1dB F 7KHz Q 5 Classic 8 G 2dB F 50Hz Q 5 G 10dB F 100Hz Q 5 G 6dB F 1KHz Q 1 G 4 5dB F 3 7KHz Q 1 G 2dB F 10KHz Q 5 6 Technical Specifications 6 1 Block Diagram 1 2 3 4 4 3 2 1 D C B A POWER SUPPLY VOLTAGE REGULATOR AC 9V INPUT 5V 5V Comp BLOCK MEMORY DRAM U10 U11 DSP ED0 ED7 U8 TMS57002DPHA EA0 EA9 AD0 AD7 MPU PROGRAM ENCODERA SO0 SI0 OUTPUT R OUTPUT L INPUTR INPUTL MONOINPUT PJ1 PJ2 FOOT SW...
Страница 20: ...Preset Programs Preset Total Combinations Internal digital audio memory Physical Net Weight Dimension 0 5 1 5 dB from 20Hz to 20 kHz 80 dB A wtg 20 Hz 22kHz 90 dB A wtg 20 Hz 22kHz 0 008 1kHz 0dBV bypass 2 1 4 unbalanced 9 dBu 500 kOhms 1 bit Sigma Delta 1 bit Sigma Delta 2 1 4 unbalanced 9 dBu 500 ohms IN OUT levels ANALOG PROGRAM selections 2 knobs Power Signal clip LED 1 4 2 conductor mono 1 4 ...
Страница 21: ...S 3 1 warrants that this product will be free from any defects in materials and or LTO workmanship for a period of 1 year from the purchase date if you have completed the Warranty Registration Card in time 3 3 During the warranty service may repair or replace this product at its own LTO option at no charge to you for parts or for labor in accordance with the right side of this limited warranty 3 4...
Страница 22: ... the exclusion or limitation of incidental or conse quential damages so the above exclusion or limitation may not apply to you 3 6 This warranty gives you the specific rights and these rights are compatible with the state laws you may also have oth er statutory rights that may vary from state to state 21 ...
