Hello, I am using a Intel Ivy Bridge CPU with an integrated HD4000. The card is connected to my amp through HDMI. Both PCM output (2 and 8 channel) and DTS/Dolby Digital passthrough are working. The only issue I am experiencing is that passthrough of HD audio formats is not working. Whenever I play a DTS-HD file I only hear a terrible crackling noise in my speakers (the amp thinks it is receiving 8 channel PCM and does *not* display "DTS-HD" in this case). This is also probably not exclusive to my hardware, it looks like no Intel graphics card can bitstream HD audio at the moment under Linux. This is what I was doing: aplay -D hdmi:CARD=PCH,DEV=0,AES0=6 -c8 -fs16_le -r192000 dtshd_test.spdif The same file is working on the same machine under Windows, so it is not a hardware issue. The audio formats supported by my amp are even recognized properly by the ALSA driver[2]. I am using alsa-lib-1.0.25 and Kernel 3.5 (also tried drm-next). Is it an ALSA issue or a Intel/DRM issue? Are there any workarounds? Should I open a new ALSA bug about this (bugtracker seems down atm)? There already is a bug in the fd.o Bugzilla [1], but an Intel developer just statet that the issue would not be on the Intel/DRM-side... Regards, Frederik [1] https://bugs.freedesktop.org/show_bug.cgi?id=49055 [2] Output of eld#3.0: localhost ~ # cat /proc/asound/card0/eld#3.0 monitor_present 1 eld_valid 1 monitor_name VSX-LX51 connection_type HDMI eld_version [0x2] CEA-861D or below edid_version [0x3] CEA-861-B, C or D manufacture_id 0x2f41 product_id 0x0 port_id 0x0 support_hdcp 0 support_ai 1 audio_sync_delay 4 speakers [0x4f] FL/FR LFE FC RL/RR RLC/RRC sad_count 9 sad0_coding_type [0x1] LPCM sad0_channels 2 sad0_rates [0x1ee0] 32000 44100 48000 88200 96000 176400 192000 sad0_bits [0xe0000] 16 20 24 sad1_coding_type [0x1] LPCM sad1_channels 8 sad1_rates [0x1ee0] 32000 44100 48000 88200 96000 176400 192000 sad1_bits [0xe0000] 16 20 24 sad2_coding_type [0x2] AC-3 sad2_channels 6 sad2_rates [0xe0] 32000 44100 48000 sad2_max_bitrate 640000 sad3_coding_type [0x7] DTS sad3_channels 7 sad3_rates [0x6c0] 44100 48000 88200 96000 sad3_max_bitrate 1536000 sad4_coding_type [0x9] DSD (One Bit Audio) sad4_channels 6 sad4_rates [0x40] 44100 sad5_coding_type [0xa] E-AC-3/DD+ (Dolby Digital Plus) sad5_channels 8 sad5_rates [0xc0] 44100 48000 sad6_coding_type [0xb] DTS-HD sad6_channels 8 sad6_rates [0x1ec0] 44100 48000 88200 96000 176400 192000 sad7_coding_type [0xc] MLP (Dolby TrueHD) sad7_channels 8 sad7_rates [0x1ec0] 44100 48000 88200 96000 176400 192000 sad8_coding_type [0xe] WMAPro sad8_channels 8 sad8_rates [0x6e0] 32000 44100 48000 88200 96000 sad8_profile 3 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
