[pulseaudio-discuss] PulseAudio 12.99.1
Hi folks, I've just pushed out the tarballs for the long overdue PulseAudio 12.99.1 (for the new folks here, that's 13.0 RC1). tarball: https://www.freedesktop.org/software/pulseaudio/releases/pulseaudio-12.99.1.tar.xz sha256: 1001206668f099cce03985b5ae39707aefaae04e9078a273c7c505d51153be31 New features include: a meson build system (coexisting with autotools for now), support for BlueZ 4 is dropped, constified various bits in headers, fixes for suspend-handling on newer Intel chipsets, and a lot of fixes across the board. A full changelog will be available with the final release. Testing of the meson build would be appreciated. We will probably prefer to move to that as the single default build system within a release or two. Embarrassingly, I lost my GPG private key while moving laptops, so the tag is signed with a new key (which should still have a similar chain of trust to the previous one). Bug reports go to Gitlab as usual (https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues) 13.0 release blockers are tracked at https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/174. Cheers, Arun ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
Re: [pulseaudio-discuss] RTP Latency - how to reduce.
On 08.07.19 15:51, Sergei Steshenko wrote: On 07/07/2019 21:47, tony.cha...@vartaxos.com wrote: I have searched Setup: Desktop machine (Centos 7, PulseAudio 10.0), and a Raspberry Pi 2B (Raspbian (Debian) Buster PulseAudio 12.2) with DAC and speaker. If I play a video point-to-point over TCP the synch is fine, but over RTP (with latency_msec=1 on RPi) there is signifcant audio latency - enough to be irritating. If I add a second, identical RPi (although with Raspbian Stretch and PulseAudio 12.2), the RTP sound is synchronous on each machine (but not with the video). This is on a small private wired LAN (Netgear GS724T V3), 1G to desktop, 100M to RPI. I have set tsched=0 in order to eradicate pops and sprogs. What can I do to reduce RTP latency? I eventually want to connect a guitar, and would need realtime loop-through, so no suggestions about increasing audio latency to obtain lip-synch, please. Tony "I eventually want to connect a guitar" - I was doing some estimates, and if I were you, I would bypass not only pulseuadio, but also ALSA I.e. I would create a dedicated audio program that bypasses the kernel and interacts with device directly. I would also starve the OS WRT scheduling. I.e. I would allocate, say, 99% of time to the dedicated program. I would also tune kernel ticks to be in sync with sample rate. --Sergei. What do you think is the actual latency you can live with? And is RTP a requirement? If ~ 10ms is sufficient and you can you also use a tunnel sink, you could try this merge request: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/merge_requests/53 It allows to reduce the latency of the tunnel sink by using a command line parameter. I was able to get down to around 7ms (real latency, measured with an oscilloscope). ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
Re: [pulseaudio-discuss] RTP Latency - how to reduce.
On 07/07/2019 21:47, tony.cha...@vartaxos.com wrote: I have searched Setup: Desktop machine (Centos 7, PulseAudio 10.0), and a Raspberry Pi 2B (Raspbian (Debian) Buster PulseAudio 12.2) with DAC and speaker. If I play a video point-to-point over TCP the synch is fine, but over RTP (with latency_msec=1 on RPi) there is signifcant audio latency - enough to be irritating. If I add a second, identical RPi (although with Raspbian Stretch and PulseAudio 12.2), the RTP sound is synchronous on each machine (but not with the video). This is on a small private wired LAN (Netgear GS724T V3), 1G to desktop, 100M to RPI. I have set tsched=0 in order to eradicate pops and sprogs. What can I do to reduce RTP latency? I eventually want to connect a guitar, and would need realtime loop-through, so no suggestions about increasing audio latency to obtain lip-synch, please. Tony ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss "I eventually want to connect a guitar" - I was doing some estimates, and if I were you, I would bypass not only pulseuadio, but also ALSA I.e. I would create a dedicated audio program that bypasses the kernel and interacts with device directly. I would also starve the OS WRT scheduling. I.e. I would allocate, say, 99% of time to the dedicated program. I would also tune kernel ticks to be in sync with sample rate. --Sergei. ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
