[sdiy] PV-1 Pitch-Voltage Converter

[John L Marshall]

I know that some on this list like alternate controllers. The topic of pitch
to voltage converters brought alternative ideas.

1) Use a cheezy Kustom radar unit to measure the speed of the pitch. It must
be a Kustom radar unit. It is the same company that made the cheezy guitar
amps with the tuck-and-roll finish. The speed reading can be converted to
analog voltage.

2) Use a pressure transducer in the catchers mit.

3) The rate that the droplets of maple fall into the bucket could be
measured. The period measured and converted to a voltage.
----- Original Message -----
From: <marmot1 at magma.ca>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, August 23, 2001 4:48 PM
Subject: [sdiy] PV-1 Pitch-Voltage Converter


> Hi List,
> Just wanted to mention that I have recently built one of Harry's PV-1
> pitch-voltage converter boards (available from EFM), and it works
> nicely. As a test, I set the Jupiter-8 to monophonic mode, fed the JP-8
> output into the PV-1, whose output in turn controlled the frequency of a
> cloned Moog Prodigy VCO. Got tight tracking over 5 octaves (length of
> JP-8 kbd). As the converter works by measuring the instantaneous period
> of the input waveform (rather than being a simple tachometer-type
> circuit) it also follows rapid pitch changes - portamento, LFO mode
> quite well. Harry was quite helpful with "technical support".
> Mike