Hello, I have a big problem with multitrack recording in Sonar. Everything sounds awesome on my monitors when I'm monitoring through Apollo but when I playback what I just recorded it sounds awful, there are lot of audio artifacts - it's sounds like that clock is not synced between the devices (but in monitoring before and while recording it sounds completely fine and synced without any sound artifacts - it's really strange). I don't monitor through DAW while recording. It happens only when I'm recording multiple channels at once, so it's a nightmare while recording drums. For example when I'm recording only single channel everything's fine. For the test/demo of the problem I decided to record a kick drum using 10 inputs at once (armed 10 tracks, altough I didn't connect any more mics, it was only one mic connected) and then without changing anything I recorded only one channel (armed only one track - mic was connected to my ADAT preamp -Focusrite Octopre) and you can hear a huge difference in the sound quality.. I tried changing sample rate, buffer size, usb safety buffer, input delay compensation etc. but nothing helped to solve this issue. I've run the latencymon test and everything's looking fine there..   BTW I hear the most artifacts on low frequency stuff with a huge transients like a kick drum, way less or almost none in room mics or snare bottom tracks.
 
10 tracks at the same time ->
https://soundcloud.com/user-436347388/kick-10-channels-recording-at-the-same-time/s-Le7uY
Single track at a time ->
https://soundcloud.com/user-436347388/kick-single-channel/s-5KRYN
 
Does anybody know how to fix this?

Do you have an FX on these tracks ? Try turning off all reverbs, exc on tracks.
It could be a PDC, latency thing. I would also download Latencymon just to get an idea on whats going.

chuckebaby
Do you have an FX on these tracks ? Try turning off all reverbs, exc on tracks.
It could be a PDC, latency thing. I would also download Latencymon just to get an idea on whats going.

no fx, latencymon afer 15 min audio playback in sonar doesn't show any problem (All lights green) with latency

You running the Apollo twin in ASIO mode correct ?
I would also try a Reboot just for the H of it. In case something is corrupt in RAM.
A Reboot will clear it out.

How have you synced both devices?

I also listened to your samples and maybe im missing something but I don't hear any difference so it could be a case of something in the way you are monitoring through the Apollo twin.

Sanderxpander
How have you synced both devices?

I choose the same sample rates (44.1) on both devices and set octopre as the clock source (internal clock on octopre)and ADAT as clock source on apollo. - it's perfectly synced while monitoring on my speakers (no artifacts, smooth sound) but sounds wrong after recording (but sounding right on my speakers at the same time while recording and monitoring...)

chuckebaby
I also listened to your samples and maybe im missing something but I don't hear any difference so it could be a case of something in the way you are monitoring through the Apollo twin.

I can hear huge difference even on my phone and laptop speakers

hubertous

chuckebaby
I also listened to your samples and maybe im missing something but I don't hear any difference so it could be a case of something in the way you are monitoring through the Apollo twin.

I can hear huge difference even on my phone and laptop speakers

yup I hear it now as well. I didn't have my speakers loud enough the first time I listened to it.
Sounds almost like something is overloading in the signal path somewhere.
 
I would check every path. Buses, gain stages, exc. On hardware and within Sonar.
Sorry im out of possible solutions.

chuckebaby
 
I would check every path. Buses, gain stages, exc. On hardware and within Sonar.
Sorry im out of possible solutions.

But it's the same track, gain on the preamp, mic position, the same kick drum, the same player etc. The first sample is while recording 10 armed tracks and the second one is only one track armed for recording. I exported only kick drum clips from the track. I'm really frustrated, I really don't know how to fix this :/ It makes recording drums impossible (without replacing everything with the samples).
I wrote to UA support a couple days ago but they are really slow with replying..