[ajs]

ok, I have some more info that may help with the "end of region click with ADC on" problem:

I now am able to reproduce this 100% of the time, but to do it, things have to be timed in a certain way. This is what happens:

First of all, it isn't really a "click" at the end of the region, it is a very short snippet of audio from almost exactly 3 seconds prior to the end of the recording that appears at the end of the region (others have mentioned that they hear bursts of a vocal at the end... this is why). Here's what happens:

(all numbers below were done in 44.1khz/24 bit sessions, WAV format, enforce mac/pc compatibility)

- The snippet of audio at the end of the region is equal to the length (within a few samples) of the maximum delay compensation (ie, the dly+cmp for the track for which dly+cmp is the maximum). So use plugs that create a long delay to see a bigger snippet.

- The origin of the snippet is the audio that starts at a position exactly (within a couple samples) 131,072 samples before the beginning of the snippet (which in turn is starts a number of samples equal to the max dly+cmp before the end of the region/recording). So about 3 seconds prior to the end of the recording.

So if the recording is shorter than 3 seconds, or there is more than 3 seconds of silence at the end, I don't get any "click"... or at least it is not audible.

Digi, here are some numbers you can examine:
(using plug-ins that created longer delay comp made the snippets longer and made it easier to identify from where they came)

(all numbers in samples)
Recording1:
max dly+cmp = 2682
region length = 252804
snippet length = 2698
starting location of snippet audio source:
from start of region = 119034
before beginning of snippet = 252804 - 119034 - 2698 = 131072

Recording2:
max dly+cmp = 127
region length = 161045
snippet length = 125
starting location of snippet audio source:
from start of region = 29848
before beginning of snippet = 161045 - 29848 - 125 = 131072

Recording3:
max dly+cmp = 2708
region length = 165494
snippet length = 2707
starting location of snippet audio source:
from start of region = 31715
before beginning of snippet = 165494 - 31715 - 2707 = 131072

Recording4:
max dly+cmp = 2692
region length = 175100
snippet length = 2697
starting location of snippet audio source:
from start of region = 41331
before beginning of snippet = 175100 - 41331 - 2697 = 131072

Recording5:
max dly+cmp = 5364 (exceeded max delay comp even on long ADC)
region length = 137591
snippet length = 2820
starting location of snippet audio source:
from start of region = 3701
before beginning of snippet = 137591 - 3701 - 2820 = 131070

Recordings 2-5 were in a session with lots of tracks and plugs. To do Recording 1, I created a brand new session, added 2 audio tracks, put a plug (Waves Linear Phase EQ since it has a long delay) on track 2, recorded on track 1 with ADC on. No other plugs, no weird routing, same result. Recordings 3-5 also had a Waves Linear Phase EQ in there to create a large delay and thus larger snippet (makes it easier to find the snippet in the recording if it is larger). To be sure it wasn't a Waves problem or dependent on really long delay compensation, in Recording 2 there were no Waves plug-ins and a relatively low total dly+cmp, but same results.

Digi, I can provide the audio files if you like. I examined and listened to the audio files in another program to see if it was playback-related but the snippets do appear in the WAV file even when played in other programs.

Hopefully this will point you in the right direction. PLEASE FIX THIS!

Let me know if I can provide any further info.

Respectfully,
Your friendly neighborhood customer/QA Engineer