[sdiy] Tap Tempo LFO

[Tom Wiltshire]

It sound ideal, Elliot.

T.

On 10 Dec 2009, at 07:03, Elliot Williams wrote:

> On Wed, 09 Dec 2009 11:19:11 -0700
> Eric Brombaugh <ebrombaugh1 at cox.net> wrote:
>
>> General consensus seems to be that delays in the 1ms - 20ms will be
>> needed, so by my estimation this means we'll need a clock signal  
>> with a
>> maximum frequency of 4Mhz or so. To avoid noticeably discrete  
>> steps we
>> should probably have resolution of at least 100 steps at the top  
>> of the
>> range, so figure about 40kHz, or a delay increment of 10us in a 4k  
>> BBD.
>
> Try the AVR Tiny45.  Its timer1 is a "fast peripheral clock" that's  
> on an 8x PLL with the CPU clock.  With the chip's internal  
> oscillator at 8MHz, it will do 64MHz.
>
> 1/64MHz * 4k BBD = 64uS resolution.  Not the 10uS resolution you  
> want, but good enough for rock and roll?  And 1/64MHz * 4k * 256 =  
> 16mS before you even mess with prescaling.
>
> (I've been thinking about doing this for a while, just never gotten  
> to it.)
>
>     Elliot.
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