wevans@elec.gla.ac.uk

I posted this question a while back. People were very kind and responded, asking me to post my patch. Being new here, I filled several pages with uncompressed patches. The entire thread is unreadable. So, at the (further) kind suggestion of those folks, I'll post one patch, compressed, and just start again.

advice-taken-how-to-make-zero-point-sample-crossings

I have created a simple monophonic audio file playback patch, but am getting clicks when switching between audio files. (I understand why this is happening.)

There are two approaches I tried, based on one idea: have two buffers that alternate between notes. When a new note comes in, I tell a mechanism to end the current note, and then switch to the other buffer and play the new note.

1) Edge~: This seems ideal, because I would only have to wait until the wave crosses the zero point to switch. That's fast. Unfortunately, I can't get it to work. It has been explained to me that this won't work because it's impossible synchronize the system (to a single sample, no less). This is because the bang is sent on another processor thread apart from the audio processing.

2) ADSR~ and Line~: I didn't seem to be able to get rid of the click unless my release was at least 15ms. That made the fade audible.

That's where I'm at. Any ideas are greatly appreciated.

The next message is the patch without any attempts at a solution.

67, border-chanter-g-low;
69, border-chanter-a-low;
71, border-chanter-b;
72, border-chanter-c-nat;
73, border-chanter-c;
74, border-chanter-d;
76, border-chanter-e;
77, border-chanter-f-nat;
78, border-chanter-f-shrp;
79, border-chanter-g;
81, border-chanter-a;


Attached is a zip file of images of four patches where I tried variations on the two mechanisms. I didn't include the patches themselves, as I think they're simple enough to reveal my ignorance. :)

Thank you for your collective consideration,

Advice Taken: How to Make Zero-Point Sample Crossings