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Speakers on iMac sound like a cheap cellphone
Found this related thread: https://mailing.openbsd.misc.narkive...penbsd-on-imac
> high pitched and a narrow with a narrow bandwith > 1) The sound from the speakers sound like they come from a cheap cellphone. > 2) When plugging in headphones the main speakers are muted, but there's > no sound from the headphones themselves. I tried setting sndiod to > channels 0:1 (default - main speakers), 2:3 (main speakers) and 4:5 (no > sound) ^ This describes it. mixerctl -v: inputs.dac-2:3_mute=off [ off on ] inputs.dac-2:3=126,126 inputs.dac-0:1_mute=off [ off on ] inputs.dac-0:1=126,126 record.adc-2:3_source=line-in [ line-in ] record.adc-2:3_mute=off [ off on ] record.adc-2:3=124,124 record.adc-0:1_source=mic [ mic ] record.adc-0:1_mute=off [ off on ] record.adc-0:1=124,124 record.dig-adc-0:1_sou=SPDIF-in [ SPDIF-in ] outputs.spkr_source=dac-2:3 [ dac-2:3 ] outputs.spkr_boost=on [ off on ] outputs.hp_source=dac-0:1 [ dac-0:1 ] outputs.spkr2_source= [ ] inputs.line-in=85,85 inputs.mic=85,85 outputs.mic_dir=input-vr80 [ none input input-vr0 input-vr50 input-vr80 ] outputs.SPDIF_source=dig-dac-0:1 [ dig-dac-0:1 ] outputs.hp_sense=unplugged [ unplugged plugged ] outputs.line-in_sense=unplugged [ unplugged plugged ] outputs.SPDIF-in_sense=unplugged [ unplugged plugged ] outputs.spkr_muters=hp { hp } outputs.master=126,126 outputs.master.mute=off [ off on ] outputs.master.slaves=dac-2:3,dac-0:1 { dac-2:3 dac-0:1 } record.volume=124,124 record.volume.mute=off [ off on ] record.volume.slaves=adc-2:3,adc-0:1 { adc-2:3 adc-0:1 line-in mic } outputs.mode=analog [ analog digital ] record.mode=analog [ analog digital ] record.enable=sysctl [ off on sysctl ] pcidump: 0:27:0: Intel 6 Series HD Audio [...] 1:0:1: ATI Radeon HD 6670 Audio pcidump -v: 0:27:0: Intel 6 Series HD Audio 0x0000: Vendor ID: 8086, Product ID: 1c20 0x0004: Command: 0006, Status: 0010 0x0008: Class: 04 (unknown), Subclass: 03 (unknown), Interface: 00, Revision: 05 0x000c: BIST: 00, Header Type: 00, Latency Timer: 00, Cache Line Size: 40 0x0010: BAR mem 64bit addr: 0x00000000a8900000/0x00004000 0x0018: BAR empty (00000000) 0x001c: BAR empty (00000000) 0x0020: BAR empty (00000000) 0x0024: BAR empty (00000000) 0x0028: Cardbus CIS: 00000000 0x002c: Subsystem Vendor ID: 8086 Product ID: 7270 0x0030: Expansion ROM Base Address: 00000000 0x0038: 00000000 0x003c: Interrupt Pin: 01 Line: 00 Min Gnt: 00 Max Lat: 00 0x0050: Capability 0x01: Power Management State: D0 0x0060: Capability 0x05: Message Signalled Interrupts (MSI) Enabled: yes 0x0070: Capability 0x10: PCI Express Max Payload Size: 128 / 128 bytes Max Read Request Size: 128 bytes 0x0100: Enhanced Capability 0x02: Virtual Channel Capability 0:27:0: Intel 6 Series HD Audio 0x0000: Vendor ID: 8086, Product ID: 1c20 0x0004: Command: 0006, Status: 0010 0x0008: Class: 04 (unknown), Subclass: 03 (unknown), Interface: 00, Revision: 05 0x000c: BIST: 00, Header Type: 00, Latency Timer: 00, Cache Line Size: 40 0x0010: BAR mem 64bit addr: 0x00000000a8900000/0x00004000 0x0018: BAR empty (00000000) 0x001c: BAR empty (00000000) 0x0020: BAR empty (00000000) 0x0024: BAR empty (00000000) 0x0028: Cardbus CIS: 00000000 0x002c: Subsystem Vendor ID: 8086 Product ID: 7270 0x0030: Expansion ROM Base Address: 00000000 0x0038: 00000000 0x003c: Interrupt Pin: 01 Line: 00 Min Gnt: 00 Max Lat: 00 0x0050: Capability 0x01: Power Management State: D0 0x0060: Capability 0x05: Message Signalled Interrupts (MSI) Enabled: yes 0x0070: Capability 0x10: PCI Express Max Payload Size: 128 / 128 bytes Max Read Request Size: 128 bytes 0x0100: Enhanced Capability 0x02: Virtual Channel Capability 0x0130: Enhanced Capability 0x05: Root Complex Link Declaration 0x0130: Enhanced Capability 0x05: Root Complex Link Declaration [...] 1:0:1: ATI Radeon HD 6670 Audio 0x0000: Vendor ID: 1002, Product ID: aa90 0x0004: Command: 0006, Status: 0010 0x0008: Class: 04 (unknown), Subclass: 03 (unknown), Interface: 00, Revision: 00 0x000c: BIST: 00, Header Type: 80, Latency Timer: 00, Cache Line Size: 40 0x0010: BAR mem 64bit addr: 0x00000000a8840000/0x00004000 0x0018: BAR empty (00000000) 0x001c: BAR empty (00000000) 0x0020: BAR empty (00000000) 0x0024: BAR empty (00000000) 0x0028: Cardbus CIS: 00000000 0x002c: Subsystem Vendor ID: 106b Product ID: aa90 0x0030: Expansion ROM Base Address: 00000000 0x0038: 00000000 0x003c: Interrupt Pin: 02 Line: 00 Min Gnt: 00 Max Lat: 00 0x0050: Capability 0x01: Power Management State: D0 0x0058: Capability 0x10: PCI Express Max Payload Size: 128 / 256 bytes Max Read Request Size: 512 bytes Link Speed: 5.0 / 5.0 GT/s Link Width: x16 / x16 0x0100: Enhanced Capability 0x0b: Vendor-Specific 0x0150: Enhanced Capability 0x01: Advanced Error Reporting 0x00a0: Capability 0x05: Message Signalled Interrupts (MSI) Enabled: no Looks like on pulseaudio changing some option to "surround" fixes it. |
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