Re: iOS PacketLogger trace misses AAC audio data
Re: iOS PacketLogger trace misses AAC audio data
- Subject: Re: iOS PacketLogger trace misses AAC audio data
- From: Matthias Ringwald via Bluetooth-dev <email@hidden>
- Date: Thu, 2 Jul 2020 22:11:36 +0200
Hi Matt
Thanks for the confirmation, I'll give it a try with a classic sniffer then.
Btw, big kudos for making iOS traces available without a jailbreak.
Cheers
Matthias
> On 2 Jul 2020, at 19:52, Matt Gillette <email@hidden> wrote:
>
> Audio data is not captured for privacy reasons. There is no way to capture
> the audio data without an over the air trace with a hardware sniffer.
>
> Matt
>
>> On Jul 2, 2020, at 5:24 AM, Matthias Ringwald via Bluetooth-dev
>> <email@hidden> wrote:
>>
>> Hi all
>>
>> Is it correct that the PacketLogger and/or iOS drops the A2DP AAC audio data
>> when recording a trace via the Bluetooth debugging profile via USB-Lightning
>> Connector? If yes, is there a way to actually get the AAC data?
>>
>> Longer explanation: our Bluetooth stack is sending the AVRCP SetAbsVolume
>> Command to the Jawbone Mini Jambox (a Bluetooth speaker) and also gets a
>> positive response, but the volume doesn't change. When iOS connects to it,
>> we can see similar SetAbsVolume Commands, but of course, volume works as
>> expected. When our stacks implements an A2DP Sink, iOS sends us the
>> unmodified audio + SetAbsVolume. To finally figure out what's going on, I
>> wanted to extract the audio data from the iOS trace to see if a) the audio
>> signal is modified with the current volume, or, b) it is send at full
>> volume, but the SetAbsVolume Command does what's expected from it.
>>
>> Best regards
>> Matthias
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