[sdiy] Through-zero FM - how much?

Mattias Rickardsson mr at analogue.org
Thu Oct 18 17:27:54 CEST 2018


On Thu, 18 Oct 2018 at 16:28, Ian Fritz <ijfritz at comcast.net> wrote:

> Mattias —
>
> I believe you are refering to the modulation index m ranging up to 8 or
> 10?  This is not what the OP asked. The modulation index is the change in
> carrier frequency divided by the modulation frequency.
>

Hi Ian,

no, I'm referring to the modulation depth as Matthew asked for it - 8 to 10
times the carrier frequency. I remember counting folding sinewaves in a
DX7-style synthesis and ending up with something like that.

But also, I might be wrong. ;-)

/mr
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