Hi Greg

> I'm not sure I fully understand track & hold, so I thought I'd ask...
>
> I am thinking of using the t&h module with a clock divider and a
> roland sh-2. First, record in a series of voltages from the sh-2
> keys, then have the track&hold play them back. With the clock divider
> triggering it every 4 beats or so, it would act like a recordable one
> bass note per measure sequencer of sorts.
>
> Would that work Or is there a better way to record(track/sample)
> simple sequences of voltages

If I understand you correctly: Yes and No.

Basically you are asking some module, which holds certain voltage
values. Both (S&H and T&H) do this.
The difference between "Sample and Hold" and "Track and Hold" is, how
the behave on changes of the ingoing control signal.

S&H:
After powering the module/system up, a Sample&Hold "listens" to the
input voltage. The output is 0V. As soon as the control signal changes
from low(=0V) to high(=5V) the input voltage will be stored in the
S&H-stage and offered at the output. It does not matter, whether the
controlsignal is still up or down, and doesn't matter alos whether the
input signal is changing or not.

T&H:
After powering the module/system up, also a Track&Hold "listens" to the
input voltage. The output is 0V. As soon as the control signal changes
from low(=0V) to high(=5V) the input voltage will fed through to the
output. The output now will change with the input as long as the control
signal is high. This is the "Track"-mode: the output tracks the input.
As soon as the control signal changes back from high to low, the output
signal (which was changing before) will be freezed at the momentary voltage.

If you compare it to the world of pictures, the S&H is like a photo
camera, which picks that actual moment. The T&H is similar like a video
which is sometimes playing sometimes paused.

So: for youre "sequencer" request: yes, multistage S&H and(!) T&H can
behave like a sequencer, but in recording mode the S&H will behave more
like expected than the T&H.

Florian