The Yamaha AN1x Synthesizer mailing list

Hi,

Finally I had time to consentrate for my string machine creation with AN1x.
Actually for a first time I was really forced to dive into programming the
beast. However by reading the manual, I didn't found information for the
following:

What's the difference between:
Saw1 and Saw2
Chorus1 and Chorus2

And what does the AM parameter in Chorus do?

Sorry if the questions are too basic, it could be also that I've gone blind
again :) ...

Cheers,
TimoS

Hi Timo,

>What's the difference between:
>Saw1 and Saw2
>Chorus1 and Chorus2

I'm not sure about the sawtooth waves, but the one of the choruses is "wide," while the other is "deep."  I don't remember which one is which.  A wide chorus sweeps between a very short delay and a longer one; you could also think of it as being a medium delay with a nearly equal amount of oscillation.  A deep chorus has a relatively long delay, with a somewhat short range of oscillation.  To put some numbers to this rather cumbersome explanation, here is an example of the two types of choruses:

Wide Chorus:   10mSec. delay <--> 40mSec. delay
Deep Chorus:   35mSec. delay <--> 45mSec. delay

I don't know if the AN1x uses exactly these values, but they are probably similar.

>And what does the AM parameter in Chorus do?

Chorus is mostly a frequency modulation (FM) effect.  However, many real-word chorusing devices, like the Leslie Speaker, create the effect by rotating a speaker at a slow speed.  This provides a "pulse" that comes from the speaker being rotated toward and away from the listener; the pulse is pure AM.  For certain effects, adding AM increases the realism.

Regards,

-BW

--
Bruce Wahler
Design Consultant
Ashby Solutions\ufffd   http://consult.ashbysolutions.com
978.386.7389  voice/fax
bruce@...