Troubleshooting the AUv3 sample code on macOS

Question

Created Feb ’20

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We haven't been able to get Apple's AUv3 sample code to work reliably across our machines.

iMac Pro Late 2017: validates and seems to work

MacBook Pro 15" 2018: auval can't find the plugin

MacBook Pro 15" Late 2013: auval -a segfaults, auval -v afux filtr Demo returns:

Input/Output Channel Handling:

1-1   1-2   1-4   1-5   1-6   1-7   1-8   2-2   2-4   2-5   2-6   2-7   2-8   4-4   4-5   5-5   6-6   7-7   8-8

X                                         X                                   X           X     X     X     X

ERROR: -10868 IN CALL Cannot Set Output Num Channels:2 when unit says it can

ERROR: -10868 IN CALL Cannot Set Output Num Channels:4 when unit says it can

ERROR: -10868 IN CALL Cannot Set Output Num Channels:5 when unit says it can

ERROR: -10868 IN CALL Cannot Set Output Num Channels:6 when unit says it can

ERROR: -10868 IN CALL Cannot Set Output Num Channels:7 when unit says it can

ERROR: -10868 IN CALL Cannot Set Output Num Channels:8 when unit says it can

ERROR: -10868 IN CALL Cannot Set Output Num Channels:2 when unit says it can

I've tried deleting ~/Library/Caches/AudioUnitCache and rebooting.

I'm not sure what else to do.

Boost

Answer 1

Feb ’20

same here.... the Example code does simply not work.

I already managed to implement the callback for

public override var channelCapabilities: [NSNumber]

{

get { return [2,2]; }

}

but i haven't found out where the bus configuration has been set and how to refuse an "illegal" channel configuration.

0