bankbot

Hey everyone. I'm currently building a small patch that takes a trigger

from an on/off guitar footswitch and uses that to 'freeze' audio going

through the patch. The way that I'm doing that is I am constantly recording

audio to a buffer in the patch while routing the non-frozen audio into a

selector object. I then 'freeze' the audio by hitting the footswitch and

routing the recorded audio out of the selector~ object. The groove~ object

just plays the audio in the buffer repeatedly, and since the buffer is very

All of this works fine, however the problem in the patch arises when I try

to resize the buffer by sending it a size $1 message followed by a clear

message. Assumedly after resizing and then clearing the buffer, the record~

object should just function as normal and it does, but the sound that comes

out of the groove~ object attached to the buffer is just a hum. If I double

click on the buffer~ and look at the waveform, everything looks like it

should. Somehow, after changing the size of the buffer~, that effectively

'breaks' the groove~ object and the patch doesnt work as it should. Does

anyone have any insight as to what's wrong with the groove~ object in the

Hey everyone.  I'm currently building a small patch that takes a trigger
from an on/off guitar footswitch and uses that to 'freeze'  audio going
through the patch.  The way that I'm doing that is I am constantly recording
audio to a buffer in the patch while routing the non-frozen audio into a
selector object.  I then 'freeze' the audio by hitting the footswitch and
routing the recorded audio out of the selector~ object.  The groove~ object
just plays the audio in the buffer repeatedly, and since the buffer is very
small, it sounds like it's frozen.

All of this works fine, however the problem in the patch arises when I try
to resize the buffer by sending it a size $1 message followed by a clear
message.  Assumedly after resizing and then clearing the buffer, the record~
object should just function as normal and it does, but the sound that comes
out of the groove~ object attached to the buffer is just a hum.  If I double
click on the buffer~ and look at the waveform, everything looks like it
should.  Somehow, after changing the size of the buffer~, that effectively
'breaks' the groove~ object and the patch doesnt work as it should.  Does
anyone have any insight as to what's wrong with the groove~ object in the
patch below?

buffer-and-groove-resizing-issue

I've tried the tapin~ tapout~ thing before but it just doesnt sound that

perfect to me. The thing about the buffer is that it seems like it is

'made' to do the stuff I need. It sounds great until I resize it. I would

try the two buffer approach but after I resize any buffer it stops the

function off the groove~ object entirely, until I reset the max patch.

I've tried the tapin~ tapout~ thing before but it just doesnt sound that
perfect to me.  The thing about the buffer is that it seems like it is
'made' to do the stuff I need.  It sounds great until I resize it.  I would
try the two buffer approach but after I resize any buffer it stops the
function off the groove~ object entirely, until I reset the max patch.

Why not just leave your buffer~ size alone... the beauty of groove~ is 

that it lets you change the loop start and end points on the fly. if 

you use a larger buffer than you need for each frozen-loop, you can 

just change the loop points to a different sized loop, or when trying 

to clear the sound, move the loop points to a silent portion of the 

Why not just leave your buffer~ size alone...  the beauty of groove~ is 
that it lets you change the loop start and end points on the fly.  if 
you use a larger buffer than you need for each frozen-loop, you can 
just change the loop points to a different sized loop, or when trying 
to clear the sound, move the loop points to a silent portion of the 
buffer.

I think "resize" also clears the buffer. Moreover, resizing takes some time so

you should not send a "clear" message immediately after. Maybe, try to remove

the "clear". But "resize" itself is not suited to live music because you can't

For freezing sound I would perhaps use a fixed-size buffer (long enough) and

choose a "start point" and an "end point" inside [groove~] (set to loop mode).

You can change these points in realtime at signal rate if you want.

Other freeze solutions include freezing reverbs (see the Freeverb or Altiverb),

infinite reverb (well, it's not really a freeze but it can sound similar) or

I think "resize" also clears the buffer. Moreover, resizing takes some time so
you should not send a "clear" message immediately after. Maybe, try to remove
the "clear". But "resize" itself is not suited to live music because you can't
know how many time it takes.
For freezing sound I would perhaps use a fixed-size buffer (long enough) and
choose a "start point" and an "end point" inside [groove~] (set to loop mode).
You can change these points in realtime at signal rate if you want.

Other freeze solutions include freezing reverbs (see the Freeverb or Altiverb),
infinite reverb (well, it's not really a freeze but it can sound similar) or
phase vocoder.

Thanks for all the ideas, everyone. What I ended up doing is just

re-assigning the buffer name to the groove object every time I resize the

Thanks for all the ideas, everyone.  What I ended up doing is just
re-assigning the buffer name to the groove object every time I resize the
buffer and that works pretty well.

My apologies for all the quoted crap on the end of that one - it's an easy trap to fall into when reading/replying via 'mail

My apologies for all the quoted crap on the end of that one - it's an easy trap to fall into when reading/replying via 'mail
cheers
Roger


No worries Roger - thanks for thinking of it. I've tidied the thread up a bit.

Buffer~ and Groove~ resizing issue