Really excellent video as always Rich, thank you for sharing. Out of interest; you have sample and hold functionality built into your quantizer - were you able to achieve something different with this circuit?
Good question, someone's paying attention! The quantizer's kind of overkill if all you want is S&H. Additionally the quantizer has no internal clock and no track and hold functionality.
Nice project! The droop is pretty noticeable. Maybe experiment with a bigger cap? Btw I like to use the track and hold with two vcos. So both the vcos receive the same cv sequence and one of them randomly holds it. So they sound the the same or not. You need a random clock though
As I understand it, droop rate and hold step both improve a factor of 10 with a factor of 10 increase in the hold capacitor, but acquisition time increases by about a factor of 10. I used Schmitz's values but they say "The timing of the sample pulse is aimed at fast aquisition (i.e. short pulse) at the cost of less precise capture. Mainly to mimic the sound of low sample rates." which I'm not sure I fully understand. Anyway, a 10 nF or larger cap should bring the droop down but the clock pulse would have to be lengthened to 30 µs or more. Not sure how wide the clock pulse can go before it becomes a problem, I suppose 30 µs should be fine. I think I have another LF398 so I can try breadboarding it sometime. I see MFOS's (discrete) S&H uses a sample time of 100 µs and a 10 nF hold cap (musicfromouterspace.com/analogsynth_new/SMPLANDHOLD200607/SMPLANDHOLD200607.php ).
Today i finished the sample and hold circuit and works like a charm. Now i have this great idea i like to share but i do not know how to approach this. What if..... we would add voltage per octave tracking so that the random notes/voltages are played in minor or major or other musical scale? A random minor/major like sequencer.? I hope someone or maybe Mr Holmes himself could use this. Have a nice day
excellent video Rich, the info is pretty easy to digest and your demos work prefectly to back up the theory.
Great explanation and that tracking option is a great touch . 👏🏾👏🏾
Really excellent video as always Rich, thank you for sharing. Out of interest; you have sample and hold functionality built into your quantizer - were you able to achieve something different with this circuit?
Good question, someone's paying attention! The quantizer's kind of overkill if all you want is S&H. Additionally the quantizer has no internal clock and no track and hold functionality.
@@analog_output Ah ha, all makes perfect sense - thank you :)
Nice project! The droop is pretty noticeable. Maybe experiment with a bigger cap? Btw I like to use the track and hold with two vcos. So both the vcos receive the same cv sequence and one of them randomly holds it. So they sound the the same or not. You need a random clock though
As I understand it, droop rate and hold step both improve a factor of 10 with a factor of 10 increase in the hold capacitor, but acquisition time increases by about a factor of 10. I used Schmitz's values but they say "The timing of the sample pulse is aimed at fast aquisition (i.e. short pulse) at the cost of less precise capture. Mainly to mimic the sound of low sample rates." which I'm not sure I fully understand. Anyway, a 10 nF or larger cap should bring the droop down but the clock pulse would have to be lengthened to 30 µs or more. Not sure how wide the clock pulse can go before it becomes a problem, I suppose 30 µs should be fine. I think I have another LF398 so I can try breadboarding it sometime. I see MFOS's (discrete) S&H uses a sample time of 100 µs and a 10 nF hold cap (musicfromouterspace.com/analogsynth_new/SMPLANDHOLD200607/SMPLANDHOLD200607.php ).
Today i finished the sample and hold circuit and works like a charm. Now i have this great idea i like to share but i do not know how to approach this. What if..... we would add voltage per octave tracking so that the random notes/voltages are played in minor or major or other musical scale? A random minor/major like sequencer.? I hope someone or maybe Mr Holmes himself could use this. Have a nice day
Sounds like you need a quantizer czcams.com/video/qMxHrlizhNU/video.html (which can act as a sample and hold too)
Yes it seems i do. Its exactly doing what ik like to have. Thanks