Modular synth

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muhammed
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Re: Modular synth

Post by muhammed » Mon Jun 18, 2012 7:08 pm

pflosi;
http://postimage.org/image/lylqlu2dn/
as you can see in the picture, I did what you said and ı can hear single voice when ı connect to my headphone to envout 2 both ON ENV-1 and ENV-2. but adsr's on ENV-1 and ENV-2 are not working , there must be a mistake
or What? . How can ı hear two voices only using my headphone ?.

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nathanscribe
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Re: Modular synth

Post by nathanscribe » Mon Jun 18, 2012 7:48 pm

I think you need to start again with your understanding of basic synthesis.

The Envelope output is not audio, it's a control voltage.

Audio chain:
VCO -> VCF -> VCA -> audio output (don't you have anything besides headphones?)

Control chain:
keyboard CV -> VCO CV
ENV -> VCA CV
keyboard gate -> ENV trigger

There are other ways, but that's one.

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Re: Modular synth

Post by Bitexion » Mon Jun 18, 2012 8:02 pm

As I said on the last page, envelopes are "outside" the audio chain. You patch them into a control input on your vco or filter. I also thought EG's were part of the audio chain first I messed with my modular.

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Re: Modular synth

Post by nathanscribe » Mon Jun 18, 2012 10:20 pm

I think they are on some (VCS3's trapezoid generators are audio and CV I think) but most analogue synths use them as control sources only.

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pflosi
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Re: Modular synth

Post by pflosi » Mon Jun 18, 2012 10:31 pm

nathanscribe wrote: Audio chain:
VCO -> VCF -> VCA -> audio output (don't you have anything besides headphones?)

Control chain:
keyboard CV -> VCO CV
ENV -> VCA CV
keyboard gate -> ENV trigger
Exactly, and what's missing in the latest pic: ENV out -> VCF / VCA

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Re: Modular synth

Post by Bitexion » Tue Jun 19, 2012 1:38 am

Don't be discouraged, modular synthesis may look easy, but gets difficult to understand quickly if you don't know the theory behind it.

With two oscillators you should be able to get pretty big sounds. But it might not feel the same/as big as a more modern synth with built-in effects like reverb.

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Re: Modular synth

Post by muhammed » Tue Jun 19, 2012 9:08 pm

thanks guys you are great Env-1 is working:)) and I can use it as two voice synth.
but ı have still a few question :oops:
1)there are some inputs or outputs on 112 module 'EXT PW MOD' ,'SYNC IN/OUT' and FRQ CV IN on 140 what are the use of those?
2)what is 'exponential' and 'linear' on 130 module
3)there are two sections on 140 module gate,gate+trigger what is the diffrence?
4)what is the difference between the 'cv' and 'gate?' Can i use cv instead of gate' or vice versa
5)there is arpegio clock in on 184 keyboard how can ı use it?
thank you for your patience

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nathanscribe
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Re: Modular synth

Post by nathanscribe » Tue Jun 19, 2012 10:18 pm

muhammed wrote:1)there are some inputs or outputs on 112 module 'EXT PW MOD' ,'SYNC IN/OUT' and FRQ CV IN on 140 what are the use of those?
112: Pulse Width (or PW) is the difference between up and down times of the pulse waveform. The same times = square wave. Different PW gives a different sound. If you change that in real time, it thickens the sound and gives a very typical synthy effect. The EXT PW MOD IN is where you plug a control voltage to sweep the pulse width automatically.

Sync is when one oscillator resets the other - used for bright, hard, squealling sounds. Connect sync out of one osc to sync in on the other and play with the tuning of both to see what happens.

140: LFO Freq CV in - a control voltage that governs the speed of the LFO (Low Frequency Oscillator - used for modulation)
3)there are two sections on 140 module gate,gate+trigger what is the diffrence?
I'm guessing that Gate is a 'one time and hold' envelope trigger, and 'gate + trig' is a hold + re-trigger for new notes during hold. In other words, the envelope will be re-triggered if you're holding other notes down, or playing legato. I'm guessing it works like on the SH-09, etc, which I used to have and seem to remember it working like that. Or similar. My memory's hazy.
4)what is the difference between the 'cv' and 'gate?' Can i use cv instead of gate' or vice versa
CV is the control voltage that comes from the note you play - it is different for each key. Gate is an on/off signal that is the same no matter what note you play. It appears on when you play a note, and goes off when you release it.

CV also comes from LFO, ENV and other modulation sources, or sequencers. Gate is for triggering things only.

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Re: Modular synth

Post by pflosi » Wed Jun 20, 2012 7:44 am

muhammed wrote: 2)what is 'exponential' and 'linear' on 130 module
That's the response curve of the VCA - use linear for cv, exponential for audio signals.
muhammed wrote: 5)there is arpegio clock in on 184 keyboard how can ı use it?
That's a clock input for the arp. Feed it with triggers to sync the arpeggiator, for example from a drum machine. If it works like all other roland arp ins that I know, the arp will proceed to the next step with each trigger, so it doesn't necessarily have to be a straight clock. To use it, engage the arp on the keyboard, feed the arp in with triggers, and connect the KCV and gate outs on the 184 as usual.

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