Dell Studio 1537 sound card info from Audacity:
==============================
Default capture device number: 4
Default playback device number: 4
==============================
Device ID: 0
Device name: ALSA: HDA Intel: STAC92xx Analog (hw:0,0)
Input channels: 2
Output channels: 0
Low Input Latency: 0.011610
Low Output Latency: -1.000000
High Input Latency: 0.046440
High Output Latency: -1.000000
Supported Rates:
==============================
Device ID: 1
Device name: ALSA: HDA Intel: INTEL HDMI (hw:0,3)
Input channels: 0
Output channels: 8
Low Input Latency: -1.000000
Low Output Latency: 0.011610
High Input Latency: -1.000000
High Output Latency: 0.046440
Supported Rates:
32000
44100
48000
88200
96000
192000
==============================
Device ID: 2
Device name: ALSA: hdmi
Input channels: 0
Output channels: 8
Low Input Latency: -1.000000
Low Output Latency: 0.011610
High Input Latency: -1.000000
High Output Latency: 0.046440
Supported Rates:
32000
44100
48000
88200
96000
192000
==============================
Device ID: 3
Device name: ALSA: pulse
Input channels: 32
Output channels: 32
Low Input Latency: 0.011610
Low Output Latency: 0.011610
High Input Latency: 0.046440
High Output Latency: 0.046440
Supported Rates:
8000
9600
11025
12000
15000
16000
22050
24000
32000
44100
48000
88200
96000
192000
==============================
Device ID: 4
Device name: ALSA: default
Input channels: 32
Output channels: 32
Low Input Latency: 0.011610
Low Output Latency: 0.011610
High Input Latency: 0.046440
High Output Latency: 0.046440
Supported Rates:
8000
9600
11025
12000
15000
16000
22050
24000
32000
44100
48000
88200
96000
192000
==============================
Device ID: 5
Device name: OSS: /dev/dsp
Input channels: 16
Output channels: 0
Low Input Latency: 0.011610
Low Output Latency: 0.000000
High Input Latency: 0.046440
High Output Latency: -0.000000
Supported Rates:
==============================
Selected capture device: 4 - ALSA: iMic USB audio system: USB Audio (hw:1,0)
Selected playback device: 4 - ALSA: iMic USB audio system: USB Audio (hw:1,0)
Supported Rates:
8000
9600
11025
12000
15000
16000
22050
24000
32000
44100
48000
88200
96000
192000
Unable to open Portmixer
========================
from lspci:
========================
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio
Controller (rev 03)
--
noise (crackling) when muting PCM volume and audio is playing
https://bugs.launchpad.net/bugs/272321
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