[sdiy] guitar effects (small stoneElectro Harmonix)vs synthesizers

[Jerry Gray-Eskue]

<<Ken Stone talks about a scaling factor of 20 between synth
and guitar effect levels>>

True, and that makes things a bit more confusing. What I think he is
allowing for is; Modular Synth signal paths are really only limited by the
voltage rails of the equipment, and the voltage the output buffers can
generate from the rail voltages. Signal input voltages are limited primarily
by the attenuation and secondly by the power rails. In the case of common op
amp and transistor output drivers you can easily hit ±10V or more.

I Assume ( and you know how that is spelled ;) that the 10V pp spec is the
"guaranteed" operating range but in most cases not a hard or clipped limit.

Comments from sdiy members with experience operating outside the 10vpp
signal range could be very informative.


- Jerry

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of Derek Holzer
Sent: Monday, October 05, 2009 6:16 AM
Cc: Synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] guitar effects (small stoneElectro Harmonix)vs
synthesizers


Sorry, I meant to say ±5V, not 5V peak to peak! That does make 10V peak
to peak. IIRC then RMS is -3 dB from peak to peak, but don't quote me on
it. Anyways, Ken Stone talks about a scaling factor of 20 between synth
and guitar effect levels.

D.

Jerry Gray-Eskue wrote:
> signal levels in the 10V P-P range, control voltages in the +/-5V or 0-10V
> range and Gate levels of 5V.
>
> http://www.modularsynth.com/chart.html
>
> - Jerry
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of Derek Holzer
> Sent: Sunday, October 04, 2009 4:02 PM
> To: mailing gigaspeeds
> Cc: 'synthdiy DIY'
> Subject: Re: [sdiy] guitar effects (small stone Electro Harmonix)vs
> synthesizers
>
>
> Typical synth is 5V peak to peak, so something a bit less for RMS ;-)
>
> Check this link again, Ken Stone does a good job of explaining the
> difference:
>
> http://www.cgs.synth.net/modules/cgs60_sba.html
>
> D.
>
> mailing gigaspeeds wrote:
>> Still fiddling with the guitar effect ;-)
>> I was wondering what the difference was between a synth signal and a
>> guitar signal.
>>
>> I found this about guitar pickups  :
>> The output voltage of pickups varies between 100 mV rms to over 1 V rms
>> for some of the higher output types.
>>
>> I want to save the trouble on calculating and measuring stuff out :p ,
>> surely somebody must have done it before on synths .
>> Anyone can enlight me on the output voltage rms of a synth (output VCA)?
>
>
> --
> ::: derek holzer ::: http://blog.myspace.com/macumbista :::
> http://www.vimeo.com/macumbista :::
> ---Oblique Strategy # 206:
> "What most recently impressed you?
> How is it similar?
> What can you learn from it?
> What could you take from it?"
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--
::: derek holzer ::: http://blog.myspace.com/macumbista :::
http://www.vimeo.com/macumbista :::
---Oblique Strategy # 12:
"Always give yourself credit for having more than personality"
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