Audio input gain changes not being applied to ax_audio_stream on ARTPEC-8

[cheval1201]

Hello,

I've been developing an ACAP application which uses audio input streams to capture real-time audio. I had it running without any problems, but recently encountered an issue: the audio input gain settings are not being applied to the ax_audio_stream on ARTPEC-8 devices (specifically, Q1656 and Q9307-LV). This problem doesn't seem to occur on other architectures (tested with CV25 & ARTPEC-7), where the audio input gain changes are applied to the ax_audio_stream correctly. I verified this behavior by logging the audio energy levels of the incoming audio frames while changing the audio input gain values.

I used the AxAudio API to create streams:
https://axiscommunications.github.io/acap-documentation/3.5/api/axaudio/html/axaudio_8h.html#a9f401a9ff9cbb03a9916cbf86ade1d33:~:text=%E2%97%86-,ax_audio_open_pcm_16_stream(),-AXAudioStream*%20ax_audio_open_pcm_16_stream

and used the VAPIX Audio API to change the input gain of the AudioSource:
https://www.axis.com/vapix-library/subjects/t10100065/section/t10036015/display

I couldn't find any release notes or documentation addressing this issue, so I'm wondering if this might be a known problem or if there's something I might be overlooking.

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[vivekatoffice]

Hi @cheval1201 ,
In my understanding, Audio API is only supported in ACAP SDK version 3.

For ACAP version 4: The new APIs are still not available and this may be the root cause of why it is not working with ARTPEC-8 devices (specifically, Q1656 and Q9307-LV)

Reference

If it is possible for you to modify this example to reproduce the issue you mentioned in a sample ACAP for ARTPEC-8(aarch64).

As per one of our expert engineers the following changes were made in Axis OS 11.8:
https://help.axis.com/en-us/axis-os-release-notes-archive#axis-os-11-8