Cornelius Renken

Hi! I've successfully managed to recreate pitch movement in a delay by changing the write and read index position. In hindsight my issue with this is that after the delay time has reached it's target, all pitching goes back to normal, because now the difference between read and write index is constant again and there is no more doppler effect. The only way to combat this is having a really long smoothing time between tempo changes but it seems inelegant.

I'm looking to fully recreate the effect of a slowed down tape:

When I change the delay time, the whole 'tape' changes tempo and all previously recorded sounds are staying pitched forever, only newly recorded sounds are at the 'correct' pitch. As I understand it, for this model, the read and write heads (index position) stay constant, and the delay time is only effected by the speed of the tape.

My thought process was therefore to keep the index positions at a constant difference, and only change the rate of the phasor writing and reading the data buffer.

I've found an amazing forum post that tackles the exact questionI have. I tried to implement everything but I failed to do so correctly. Maybe somebody with more gen/max knowledge would know of a better way to convert this explanation into gen.

https://forum.mutable-instruments.net/t/simulating-tape-analogue-delay-in-dsp/7789/7

If somebody could give an insight into where im going wrong, i'd be extremely thankful! Especially with the linked forum post being exactly my question, I feel so close but yet so far.

Tape Delay in Gen~.maxpat

I'm looking to fully recreate the effect of a slowed down tape:
When I change the delay time, the whole 'tape' changes tempo and all previously recorded sounds are staying pitched forever, only newly recorded sounds are at the 'correct' pitch. As I understand it, for this model, the read and write heads (index position) stay constant, and the delay time is only effected by the speed of the tape.

My thought process was therefore to keep the index positions at a constant difference, and only change the rate of the phasor writing and reading the data buffer.

I've found an amazing forum post that tackles the exact questionI have. I tried to implement everything but I failed to do so correctly. Maybe somebody with more gen/max knowledge would know of a better way to convert this explanation into gen.
https://forum.mutable-instruments.net/t/simulating-tape-analogue-delay-in-dsp/7789/7 
(This is the post, by user TheSlowGrowth)

If somebody could give an insight into where im going wrong, i'd be extremely thankful! Especially with the linked forum post being exactly my question, I feel so close but yet so far.

Thanks!
Cornelius

Hi! I've successfully managed to recreate pitch movement in a delay by changing the write and read index position. In hindsight my issue wit

Gen~ Tape Delay Emulation (tape speed)