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Verb

24

32 Bit Digital Effects Module

User's Manual

LTO

R

www.altoproaudio.com

Version 2.0 Dec. 2002

English

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Summary of Contents for a Verb

Page 1: ...Verb 24 32 Bit Digital Effects Module User s Manual LTO R www altoproaudio com Version 2 0 Dec 2002 English ...

Page 2: ...ed in this manual Do not short circuit the fuse holder Before replacing the fuse make sure that the product is OFF and disconnected from the AC outlet Always use proper ready made insulated mains cabling power cord Failure to do so could result in shock death or fire If in doubt seek advice from a registered electrician Within the product are areas where high voltages may present To reduce the ris...

Page 3: ...g These are designed for your safety Do not remove Ground connections If the plug does not fit your AC outlet seek advice from a qualified electrician Protect the power cord and plug from any physical stress to avoid risk of electric shock Do not place heavy objects on the power cord This could cause electric shock or fire When required either blow off dust from the product or use a dry cloth Do n...

Page 4: ...our dreams paying attention to your suggestions and your comments Following this idea we create 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 Verb is the result of many hours of listening and tests involving common people area experts musi...

Page 5: ...ffects 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 Effects Mix Level Adjust d Effects Bypass 4 3 Installation a Standard Use b Application Examples Line Instrument Mixer 4 4 Rack Mounting 5 Preset Functions Descriptions 13 5 1 Reverbs a Halls b Rooms c Pl...

Page 6: ...y 5 4 Combined Effects a Delay Reverb b Flanger Reverb c Chorus Reverb 5 5 Effects Summary Table a Program Chart b Preset Value 6 Technical Specifications 28 6 1 Block Diagram 6 2 Specifications 7 Warranty 31 5 ...

Page 7: ...arameter of the current algorithm and for some algorithm as chorus and flanger may decide also the shape of the modu lating signal Sinusoid or Ramp The first 8 algorithms are reverb algorithms and have been designed following the theory of different reverberation algorithms taking care about the density and the body of the reverberated sound The second 8 algorithms have been designed following the...

Page 8: ...ration LED Displays the signal level coming into the input during Normal operation if the signal level is too high this LED light and you will begin to hear the signal distortion Power On Off Switch Turns the apparatus on and off Inputs These are 1 4 unbalanced phone jacks which connect to sources such as the effects sends of mixing console They may be used with nominal input level up to 9dBu For ...

Page 9: ...audio devices have to be made using high quality cables so to prevent bad performances of the Verb itself So it should be good to use low capacitance shielded cables with a flexible internal conductor Connect the cables to the Verb properly by observing the following precautions Do not bundle audio cables with AC power cords Do not place audio cables and Verb near sources of electromagnetic inter ...

Page 10: ...in the middle balancing the effects with the sound of the source instrument If the Verb is connected to a mixing console s Aux Send the MIX control should be set all the way to the right effects only so that the balance can be controlled from the board At any time you can bypass the process there by allowing the direct signal to pass through the Verb unchanged This can be done in two ways by turni...

Page 11: ...Verb to a stereo amplification system or two mixer inputs STEREO Connect two audio cables to the LEFT and RIGHT INPUTS of the Verb from a stereo source and two other audio cables from the LEFT and RIGHT OUTPUTS of the Verb to a stereo amplification system or two mixer inputs R LTO Hall 3 Plate 1 Plate 2 Room 2 Room 1 Room 3 Hall 2 Hall 1 OUTPUT INPUT MIX VARIATIONS 0 10 0 10 0 10 SIGNAL 1 2 3 4 5 ...

Page 12: ...sends are used to send the signal to be effected to devices as the Verb Connect the Verb using post fader sends so fading a channel out its effects will fade also Using a mixer s aux sends allows each channel to have its own level control going to the aux output It is possible to mix all the channels we want to be sent to the effects by using the individual channels aux send levels on the mixer Mo...

Page 13: ... a stereo input is especially useful on the true stereo reverb program In the above connections it is necessary to set proper levels on the mixer s individual Aux Sends Aux Masters and Aux Return masters as well as the Verb s own controls to get good clean quiet results By having the correct level at every point in the send return chain it is possible to avoid overloading distortion and minimize n...

Page 14: ...reflections decay over time and the decaying is depending on the room size the position of the sound source acoustic space the nature of obstacles shape material dimension etc and many other factors This algorithm is the simulation of a large acoustic space as a concert hall Halls want to simulate large rooms with many reflective surfaces where sounds can be reflected and also hided changing its c...

Page 15: ...s the one achievable with a synth sound Room 3 The third room is the warmest one and is perfect for acoustic guitars and classical instruments This algorithm want to simulate the sound of a classic plate reverb obtained in the past using suspended sheet of metal with transducers at either end This kind of reverb commonly used in the 1970 s it is still useful for its transparent sound and it works ...

Page 16: ...to build up the proper illusion using an electronic device the original sound is summed with a slightly delayed and detuned version of itself Instead of a constant pitch deviation more natural results come from a varying pitch deviation two players never keep con stant their relative pitch distance Verb s algorithm implements the variable delay and the detuning of it is modulated by an LFO low fre...

Page 17: ...ers phase effects due to air turbulence etc The rotary speaker system is normally used with organs but can be used also for guitar amplification Note When using the Rotary program the Mix potentiometer has be turned all right on WET position Rotary Parameters Adjust Rate This control sets the amplitude modulation rate Delay effect is a single echo repetition where the repetitions occur after a cer...

Page 18: ... Algorithm Input LP filter 16 kHz Process High Damp Filter 12 kHz Process Low Damp Filter 50 Hz Predelay Time 0 054 ms Output LP filter 16 kHz Output HP filter 50 Hz DECAY TIME ROOM 1 Input LP filter 14 kHz Process High Damp Filter 12 kHz Process Low Damp Filter 20 Hz Predelay Time 0 003 ms Output LP filter 12 kHz Output HP filter 20 Hz ROOM REVERB Algorithm DECAY TIME HALL 2 HALL REVERB Algorithm...

Page 19: ...mp Filter 20 Hz ROOM REVERB Algorithm DECAY TIME ROOM REVERB Algorithm DECAY TIME PLATE REVERB Algorithm PLATE REVERB Algorithm DECAY TIME DECAY TIME TREMOLO Input High Damp Filter 18 kHz Input Low Damp Filter 10 Hz Modulating Waves 1 to 8 RAMP 9 to 16 SIN MODULATING WAVE AMPLITUDE MODULATION Algorithm MODULATION RATE CHORUS Input High Damp Filter 18 kHz Input Low Damp Filter 10 Hz Modulating Wave...

Page 20: ...ut High Damp Filter 18 kHz Input Low Damp Filter 10 Hz Predelay Time 8 ms Process LP filter 12kHz Modulating Waves 1 to 8 RAMP 9 to 16 SIN REGENERATION PERCENTAGE MODULATING WAVE CHORUS REVERB Input High Damp Filter 18 kHz Input Low Damp Filter 10 Hz Predelay Time 8 ms Process LP filter 12kHz Modulating Waves 1 to 8 RAMP 9 to 16 SIN MODULATING WAVE ROTARY SPEAKERS Cylinders LP filter 200 Hz Horns ...

Page 21: ...time 2 80 sec Hall 2 2 Decay time 0 49 sec 3 Decay time 0 51 sec 4 Decay time 0 58 sec 5 Decay time 0 68 sec 6 Decay time 0 80 sec 7 Decay time 0 82 sec 8 Decay time 1 00 sec 9 Decay time 1 22 sec 10 Decay time 1 52 sec 11 Decay time 2 11 sec 12 Decay time 2 40 sec 13 Decay time 3 50 sec 12 Decay time 3 50 sec 13 Decay time 5 30 sec 1 Decay time 0 39 sec 1 Decay time 0 45 sec 12 Decay time 2 20 se...

Page 22: ...me 25 sec Room 2 2 Decay time 0 43 sec 3 Decay time 0 44 sec 4 Decay time 0 50 sec 5 Decay time 0 54 sec 6 Decay time 0 59 sec 7 Decay time 0 75 sec 8 Decay time 0 89 sec 9 Decay time 1 07 sec 10 Decay time 1 33 sec 11 Decay time 1 84 sec 1 Decay time 0 36 sec 12 Decay time 2 00 sec 13 Decay time 3 00 sec 14 Decay time 3 60 sec 15 Decay time 7 50 sec 14 Decay time 6 40 sec 15 Decay time 13 90 sec ...

Page 23: ...time 0 96 sec 8 Decay time 1 09 sec 9 Decay time 1 45 sec 10 Decay time 1 65 sec 11 Decay time 2 18 sec 12 Decay time 2 50 sec 13 Decay time 3 90 sec 14 Decay time 4 90 sec 15 Decay time 9 10 sec 16 Decay time 30 sec Plate 2 1 Decay time 0 42 sec 1 Decay time 0 44 sec 9 Decay time 1 07 sec 10 Decay time 1 30 sec 16 Decay time 25 sec Room 3 2 Decay time 0 38 sec 3 Decay time 0 41 sec 1 Decay time 0...

Page 24: ...4 30 sec 12 600 ms 5 30 sec 13 700 ms 6 30 sec 14 800 ms 7 00 sec 15 900 ms 8 00 sec 16 1000 ms 10 00 sec Variation encoder position Delay Time Decay Time 1 30 ms 13 Decay time 3 70 sec 14 Decay time 4 80 sec 2 Decay time 0 51 sec 3 Decay time 0 56 sec 4 Decay time 0 64 sec 5 Decay time 0 67 sec 6 Decay time 0 81 sec 7 Decay time 0 96 sec 8 Decay time 1 07 sec 9 Decay time 1 39 sec 10 Decay time 1...

Page 25: ...4 7 100 ms 10 00 Hz 84 8 60 ms 16 00 Hz 84 9 1400 ms 0 71 Hz 36 10 840 ms 1 19 Hz 36 11 650 ms 1 56 Hz 36 12 470 ms 2 12 Hz 36 11 600 ms 4 40 sec 6 00 sec 12 700 ms 5 00 sec 7 30 sec Variation encoder position Delay Rev Preset encoder position Delay Time Delay Decay Time Rev Decay Time 1 30 ms 1 30 sec 2 40 ms 1 30 sec 3 50 ms 1 30 sec 4 60 ms 1 40 sec 5 80 ms 0 75 sec 1 30 sec 6 100 ms 1 40 sec 2...

Page 26: ...5 Hz 60 5 6 05 sec 0 165 Hz 72 6 6 05 sec 0 165 Hz 82 1 13 4 sec 0 075 Hz 67 Variation encoder position Preset encoder position Period Rate Amplitude Att 13 400 ms 2 50 Hz 36 14 320 ms 3 12 Hz 36 15 260 ms 3 84 Hz 36 16 200 ms 5 00 Hz 36 Preset encoder position Variation encoder position Period Rate Chorus 2 4 80 sec 0 21 Hz 3 3 20 sec 0 31 Hz 4 1 78 sec 0 56 Hz 5 1 20 sec 0 83 Hz 6 1 09 sec 0 91 ...

Page 27: ...0 sec 0 625 Hz 1 75 sec 12 1 60 sec 0 625 Hz 2 20 sec 13 1 60 sec 0 625 Hz 3 00 sec 14 1 60 sec 0 625 Hz 4 00 sec 15 1 60 sec 0 625 Hz 5 20 sec 16 1 60 sec 0 625 Hz 8 00 sec 6 1 30 sec 0 769 Hz 4 00 sec 7 1 30 sec 0 769 Hz 5 20 sec Variation encoder position Preset encoder position Period Rate Feedback 7 6 05 sec 0 165 Hz 89 8 6 05 sec 0 165 Hz 92 9 4 50 sec 0 222 Hz 82 10 3 00 sec 0 333 Hz 82 11 ...

Page 28: ...sec 5 2 00 sec 0 500 Hz 3 00 sec 1 2 00 sec 0 500 Hz 0 80 sec 6 2 00 sec 0 500 Hz 3 60 sec 7 2 00 sec 0 500 Hz 4 20 sec 8 2 00 sec 0 500 Hz 6 40 sec 9 2 60 sec 0 384 Hz 0 80 sec 10 2 60 sec 0 384 Hz 1 30 sec 11 2 60 sec 0 384 Hz 1 75 sec 12 2 60 sec 0 384 Hz 2 20 sec 13 2 60 sec 0 384 Hz 3 00 sec 14 2 60 sec 0 384 Hz 3 60 sec 15 2 60 sec 0 384 Hz 4 20 sec 16 2 60 sec 0 384 Hz 6 40 sec 27 ...

Page 29: ...OGRAM SO0 SI0 OUTPUT L FOOT SWITCH INPUT R INPUT L MONO INPUT PJ1 PJ2 PJ5 PJ3 PJ4 VARIATIONS ENCODER A STEREO AUDIO CODEC U6 PCM3001E A D and D A CONVERTER INPUT BUFFER AMPLIFIER OUT R OUT L INPUT LEVEL OUTPUT AMPLIFIER OUTPUT LEVEL MIX CONTROL LRCKIN 43 20KHZ BCK 1 3 82MHZ U8 TMS57002DPHA FOOTSWITCH CONTROL ENCODER A Q1 11 0592MHZ 11 0592MHZ CLOCK DIVIDE U7 74HC393 IN R IN L INPUT LEVEL OUTPUT LE...

Page 30: ... pedal type 9 Volt AC Power Transformer PROGRAM selections 2 knobs for momentary footswitches Electrical Frequency Response S N Ratio process S N Ratio bypass THD Noise Input Number of Channels Format Maximum Level bypass Impedance A D D A Conversions A D converter D A converter Output Number of Channels Format Maximum Level bypass Output Impedance Front Panel Controls Indicators Rear Panel Input ...

Page 31: ...ccumulator 16 256 3000 milliseconds 1kg 2 20lb 200 W 150 D 45 H mm Processing and Memory Processor Speed Internal DSP resolution Main Preset Programs Preset Total Combinations Internal digital audio memory Physical Net Weight Dimension 7 87 5 91 1 77 30 ...

Page 32: ... CONDITIONS 3 1 warrants that this product will be free from any defects in materials and or workman LTO ship 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 option LTO at no charge to you for parts or for labor in accordance with the right side of this limited w...

Page 33: ...w the exclusion or limitation of incidental or consequential 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 other statutory rights that may vary from state to state 32 ...

Page 34: ...ll rights reserved to ALTO Mobile Due to continued development in response to customer feedback product features specifications and or internal external design may be changed without prior notice No photocopying translation or reproduction of any part of this user manual is allowed without prior written permission Copyright 2004 Seikaku Technical Group Limited c NF00122 1 0 ...

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