BIAS FX 2 Mobile some presets no output
After the last update, some of my user presets work for a few seconds and then I can hear like a screeching noise and output goes out. I can change preset and all works as expected, but changing back to the preset that caused the noise yield no output.
Here’s a video of the symptom. You can notice that there’s output and then volume goes up and then no output. I change preset, output ok. I change yet again to another preset and you can see output clipping and out.
Ok, I found something...
I'm using a Behringer UMC202HD as the audio interface. I have always used it with 96000 sample rate with BIAS FX 2 Mobile. For some reason, the new update of BIAS has issues with this sample rate on some presets (FX or cabs???).
I had to set the sample rate to 48000 in BIAS and restart. This is something to take a look at, IMO. As I said before, this was introduced in the latest update.
BTW, using iPhone 11. Will test on iPad Gen 9 with 96000 as soon as I get it and let know here.
Gary_Hutchings last edited by Gary_Hutchings
Backing up unique data/settings/patches is always step number one. Write out the setting by hand if necessary
Bit rate mismatch can certainly cause major audio distortion, but it should been seen across all patches, if bit rate were root cause. I went through bit rate issues with my M-Audio Air 192/4.
As long as the bit rate on the device and application match, as well as your computer being able to handle processing the audio at higher bit rates, you should be good there. You could try running both/all on 44000 as a test of that
Are your custom patches backup? Have you done a factory reset since the update? I hate to say it, but some patches working fine, while others distort wildly would be more indicative of patch corruption.
I have no idea if any of this helps, I don't have access to Positive Grid's internal tech support database. But from what I have observed in the forums, and with my own personal experience, factory rest seems to be a "first try" for issues as serious as yours.
At one point, Bias FX 2 stopped recognizing my Air 192/4. I approached it as an M-Audio problem, did a complete uninstall and reinstall of the latest drivers. Used a different cable, and USB port."USB3 Blue port". No luck, I tried the factory rest in BIAS FX 2 as a test. As soon as I ran the factory reset, BIAS FX 2 saw the Audio interface again. It is very easy for database tables to corrupt, especially during upgrades..
@gary_hutchings Thanks for the reply!
I did in fact removed the App and reinstalled (backing up to cloud and restoring after reinstall). I even upgraded iOS to version 15.
But problem persists. It seems like it might be an FX-Amp combination. But that's me speculating.
Gary_Hutchings last edited by
Damn, well.. Without access to their knowledge base, I don't know what to say. Looks like we are in the hands of support for this one :( I hope they find a resolve for you, I won't stop thinking about it though. Who knows, I might think of something yet :D
Ok.. My iPad Gen9 arrived yesterday and I'm sad to say that it has the same behavior.
I can use some presets using 96000 sample rate and everything sounds great. But then I change to some other preset and I can hear good sound, but after a few seconds, I hear a screeching sound and can see the output clipping. Then the output becomes less and less until no output can be heard.
Why some presets work at 96000 sample rate and others not is the question...