Amplifier power cycle crashes MOTU UltraLite mk3 Hybrid
Posted: Mon Jan 23, 2017 11:17 am
Took me a while to figure this out, but if I power cycle my amp, an Adcom GFA-535ii, it will cause the UltraLite to stop responding to the PC, until I power cycle the interface.
This doesn't happen every single time, but will happen within 10 cycles, even if the power change has a 10 second delay between all event.... usually it occurs within 5 cycles.
This didn't happen with the m-audio the UltraLite replaced.
This seems to be happening with the Adcom amplifiers connected to my other interface, the 896mk3 Hybrid, although instead of *just* not playing audio, the computer will stutter on video as well, and requires a *computer* reboot, instead of just an interface reboot. I'm still testing this case.
While I'm bitching:
On both setups, and testing on Win7, Win 8, Win8.1, Win 10, and Win 10 Anniversary, enabling "WaveRT" playback in the Motu Audio Console causes corrupted audio during a long playback session, usually within the hour. The corrupted audio is recognizable, although it becomes worse at fixed intervals which seem to be at an integer multiple of the time it takes to originally corrupt.
Higher data rates seem to cause this corruption quicker: 2 channel 44.1khz takes around an hour, 2 channel 96khz seems to take around half that. High bitrate 7.1 surround corrupts well under half an hour.
A fix requires some combination of rebooting the computer, rebooting the interface, or occasionally can be fixed by restarting the driver by changing bit rates and changing them back.
As a programmer, this is screaming it's a corrupt circular buffer somewhere in MOTU's driver. This glitch fails to occur with any other WaveRT device I've had access to.
This doesn't happen every single time, but will happen within 10 cycles, even if the power change has a 10 second delay between all event.... usually it occurs within 5 cycles.
This didn't happen with the m-audio the UltraLite replaced.
This seems to be happening with the Adcom amplifiers connected to my other interface, the 896mk3 Hybrid, although instead of *just* not playing audio, the computer will stutter on video as well, and requires a *computer* reboot, instead of just an interface reboot. I'm still testing this case.
While I'm bitching:
On both setups, and testing on Win7, Win 8, Win8.1, Win 10, and Win 10 Anniversary, enabling "WaveRT" playback in the Motu Audio Console causes corrupted audio during a long playback session, usually within the hour. The corrupted audio is recognizable, although it becomes worse at fixed intervals which seem to be at an integer multiple of the time it takes to originally corrupt.
Higher data rates seem to cause this corruption quicker: 2 channel 44.1khz takes around an hour, 2 channel 96khz seems to take around half that. High bitrate 7.1 surround corrupts well under half an hour.
A fix requires some combination of rebooting the computer, rebooting the interface, or occasionally can be fixed by restarting the driver by changing bit rates and changing them back.
As a programmer, this is screaming it's a corrupt circular buffer somewhere in MOTU's driver. This glitch fails to occur with any other WaveRT device I've had access to.