This is the output of the command you provided: $ aplay -D hw:0 --dump-hw-params /tmp/test_stereo_48000Hz_8bit_PCM.wav Playing WAVE '/tmp/test_stereo_48000Hz_8bit_PCM.wav' : Unsigned 8 bit, Rate 48000 Hz, Stereo HW Params of device "hw:0": -------------------- ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED FORMAT: S16_LE S32_LE SUBFORMAT: STD SAMPLE_BITS: [16 32] FRAME_BITS: [32 128] CHANNELS: [2 4] RATE: [44100 48000] PERIOD_TIME: (166 11888617) PERIOD_SIZE: [8 524288] PERIOD_BYTES: [128 8388608] PERIODS: [2 32] BUFFER_TIME: (333 23777234) BUFFER_SIZE: [16 1048576] BUFFER_BYTES: [128 4194304] TICK_TIME: ALL -------------------- aplay: set_params:1233: Sample format non available Available formats: - S16_LE - S32_LE
So I guess that means there is a max of 4 channels and we need to add a low pass filter in the pulseaudio config? unfortunately I have no idea how to do that... And for me it still doesn't explain why there is no sound coming from my subwoofer. I already have the third channel activated as described in several topics and I see the subwoofer in the settings but there is still no sound... -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1553685 Title: Lenovo Y700-17ISK subwoofer doesn't work Status in alsa-driver package in Ubuntu: Incomplete Bug description: Lenovo Y700-17ISK (Intel Core i7-6700HQ/RAM 16GB/SSD 512GB/Nvidia GTX960M 4GB) Operating system: Ubuntu 16.04 (xenial-desktop-amd64.iso 04-Mar-2016, kernel 4.4.0-10-generic, nvidia 361.28) Problem: Notebook subwoofer doesn't work. Judging from alsa-info.sh output, there is no pin declared for the bass output by BIOS. Please find a zip file attached: 'alsa-info_hdajackretask-unconnected-pins' ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-10-generic 4.4.0-10.25 ProcVersionSignature: Ubuntu 4.4.0-10.25-generic 4.4.3 Uname: Linux 4.4.0-10-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: aljosa 1776 F.... pulseaudio CurrentDesktop: Unity Date: Sun Mar 6 11:02:21 2016 HibernationDevice: RESUME=UUID=ac022671-63df-40ae-bffe-66fff3b35125 InstallationDate: Installed on 2016-03-05 (0 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160304) MachineType: LENOVO 80Q0 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-10-generic.efi.signed root=UUID=aa4325c4-4b4c-4372-b8ca-a66c3e5b2aa6 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-10-generic N/A linux-backports-modules-4.4.0-10-generic N/A linux-firmware 1.156 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/31/2016 dmi.bios.vendor: LENOVO dmi.bios.version: CDCN30WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: Allsparks 7A dmi.board.vendor: LENOVO dmi.board.version: NO DPK dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo ideapad Y700-17ISK dmi.modalias: dmi:bvnLENOVO:bvrCDCN30WW:bd01/31/2016:svnLENOVO:pn80Q0:pvrLenovoideapadY700-17ISK:rvnLENOVO:rnAllsparks7A:rvrNODPK:cvnLENOVO:ct10:cvrLenovoideapadY700-17ISK: dmi.product.name: 80Q0 dmi.product.version: Lenovo ideapad Y700-17ISK dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1553685/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp