Encoding Audio for Resolume Play

[pfelberg]

Hi.
I rarely work with audio in my system, but I´ve had some weird issues with audio and Resolume already, like audio losing sync, for instance.

Now I have this clip, 1024x768 pixels, 48 secs long, DXV encoded with an audio track.
It plays beautifully in my MacBookPro quicktime player. But inside Arena, again, issues.
I have two versions of the clip one with audio and the other with no audio track.
This clip is the opening of an important presentation, so it must play flawless.
It plays alone, meaning no other layer has content, no effect is applied. Just it.
The "silent" version plays flawless, perfectly at almost 60fps.
The audio version also plays at almost 60fps, but NOT flawless. The play keeps freezing two or three times, for 1/2 sec or more, during play and I am missing important frames of the animation.
The presentation is Saturday, so I am a little bit worried.

My guess is that the audio was encoded like this:
Format: QDesign Music 2
Sample rate: 48.000
Bit Depth: 16
Channels: Stereo

So I ask:
Is there a proper/best audio compression for a clip to play smoothly in arena?

Thanks!!!

[pfelberg]

I realized there was a noticiable instability and sudden drop of the FPS rate.
Oscilating from 60 to 30 and back most of the time, but down to 5 at the "freeze" positions, which were never the same.
I re-encoded the file and removed the alpha information which I actually didn´t need within the file.
Played a couple of times so far and FPS kept pretty stable from 58 to 60 FPS.

I still would like some sort of advice concerning the audio, if possible.

[drazkers]

What are your audio settings in preferences?

[pfelberg]

output device: built in Output
master output channels: output1 & output 2
preview output channels: No output
sample rate: 44100
buffer size: 128
External Audio FFT Input: No input
SMPTE: No input
SMPTE timecode framerate: 25 now changed to 29.97

[pfelberg]

Why everytime I load a new clip with an audio track into Resolume, the clip presents itself entirely out of pitch?
I don´t understand audio and bpm at all. But it loads as 62BMP aprox.
Then I must set it to 120BPM, so it plays at normal pitch.

tks

[Joris]

buffer size: 128

This is quite low, setting it to 512 or 1024 will most likely fix your issue.

SMPTE: No input
SMPTE timecode framerate: 25 now changed to 29.97

Changing the SMPTE framerate only affects clips set to SMPTE timeline. It has no effect when there is no SMPTE input.

Why everytime I load a new clip with an audio track into Resolume, the clip presents itself entirely out of pitch?

Resolume makes an educated guess on the BPM by analyzing the track. Usually you'll need to check this import guess and save it during setup before the show. BTW, 62 is (very close to) half speed from 120 BPM, so actually it comes quite close.

If you don't want to use the BPM function for clips and just play them at their correct pitch, you can set the default import mode for audio tracks to timeline.

[pfelberg]

This is quite low, setting it to 512 or 1024 will most likely fix your issue.

Will try that.

If you don't want to use the BPM function for clips and just play them at their correct pitch, you can set the default import mode for audio tracks to timeline.

Good enough!!

Tks. I will post my results in a bit.