July 2020 - Bluetooth-dev - lists.apple.com

Re: iOS PacketLogger trace misses AAC audio data
by Matthias Ringwald via Bluetooth-dev 02 Jul '20

02 Jul '20

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=bluekitchen-gmbh.com; s=default; h=To:References:Message-Id: Content-Transfer-Encoding:Cc:Date:In-Reply-To:From:Subject:Mime-Version: Content-Type:Sender:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Lhj2cQGCCXFflpTScsuRtY5LuWPTC9M8YpEQfj9geqA=; b=gJNjJ7+asE/aZCz+//FWK37wV KAMcArfKdAf+Hie/G9+e4MR/h9BE0sos4/Tv3okxABM2bfJTGQM5JT0nBNx+NgauNvRSpmeDIjxSF fRsolxjkvmDx0pgH2GVxv4gsTekaDX4FhZtrJK7Odg5pmiL1irA2w4iBtIrroU9pfN9MjWQSe3/xv mIRnBRMmzDeRZkfiGKcjuQa7ZQ6d+PyXuIKXg+mh6rXGaJZOmkVRUXapwLq8cqXOvKq2zF2LyFJA8 6Q8c46VnK2/WQicrbLeCE5yzlKeBT6QmA4jg3EEuE1DAoizlOQ4ITQowl0tA4jML7f2A8z4dEqS3H CkC/KHakQ==; 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 <mgillette(a)apple.com> 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 >> <bluetooth-dev(a)lists.apple.com> 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 >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/bluetooth-dev/mgillette%40apple.com >> >> This email sent to mgillette(a)apple.com > _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: iOS PacketLogger trace misses AAC audio data
by Matt Gillette via Bluetooth-dev 02 Jul '20

02 Jul '20

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com 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 > <bluetooth-dev(a)lists.apple.com> 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 > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/bluetooth-dev/mgillette%40apple.com > > This email sent to mgillette(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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iOS PacketLogger trace misses AAC audio data
by Matthias Ringwald via Bluetooth-dev 02 Jul '20

02 Jul '20

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=bluekitchen-gmbh.com; s=default; h=To:Date:Message-Id:Subject:Mime-Version: Content-Transfer-Encoding:Content-Type:From:Sender:Reply-To:Cc:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=GXI94YVhA6uWyU5eqNKDo8umAaQg+PWSLeZ89LS1J54=; b=SiyZphgKW2RHtKFh+bt1vLdiI1 WPa2e7VWReso324wYvRPbkK/r7ch1+xxbY+J1hd7Z57dqgkWsa8/AaVm5nLvo+gTb2/IAUmjT5dvp yHBlJ1Bk/YkfcM4L2rFp18o+55FpV2vbnA2nNvbGOVznocdINBYdKU5IYidbVU0xIahqgSAU5dY+D rB1134T4O19gIb9RkMhUvYF2H1EMo2369lgJ0F87QH4pUcJjjC1fDGNjIrjAMVg0mbZxQDm78KWEu uhRrnsqd8lDgq8YNrIeAfeHUY+u2qfAKB03rIw/sjgFPWv2TG5uclsqChXjLH84YZ2r1IUUHs1S27 dRR7dYSQ==; 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 _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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