PulseAudio on OpenWRT with MPD and other Stuff: Difference between revisions

← Older edit Newer edit →

VisualWikitext

@@ Line 82: / Line 82: @@
 <br />
-==== Crap that Does NOT work ====
+====Crap that Does NOT work====
 btmgmt "connect" (doesn't exist)
 hcitool cc WhatEverMACaddress (doesn't work)
+=== ALSA Related Commands ===
+alsamixer: shows a text GUI of controls
+aplay -l : shows list of sound devices
+aplay -L : Shows a list of the various output ports
+arecord -l : Shows a list of input / source devices (note, if PulseAudio is running and / or using a device it will show the device as 0, IE, 'unavailable')
+arecord -L : Shows a 'limited' list of the input / source devices
+amixer scontrols : Shows a 'brief' list of devices
+amixer scontents : Shows a detailed list of devices
+Example below;<syntaxhighlight lang="text">
+amixer scontrols
+Simple mixer control 'Speaker',0
+Simple mixer control 'PCM',0
+Simple mixer control 'PCM Capture Source',0
+Simple mixer control 'Line',0
+Simple mixer control 'Mic',0
+Simple mixer control 'IEC958 In',0
+amixer sdevices
+Simple mixer control 'Speaker',0
+  Capabilities: pvolume pswitch pswitch-joined
+  Playback channels: Front Left - Front Right - Rear Left - Rear Right - Front Center - Woofer - Side Left - Side Right
+  Limits: Playback 0 - 197
+  Mono:
+  Front Left: Playback 184 [93%] [-2.44dB] [on]
+  Front Right: Playback 184 [93%] [-2.44dB] [on]
+  Rear Left: Playback 196 [99%] [-0.19dB] [on]
+  Rear Right: Playback 196 [99%] [-0.19dB] [on]
+  Front Center: Playback 196 [99%] [-0.19dB] [on]
+  Woofer: Playback 196 [99%] [-0.19dB] [on]
+  Side Left: Playback 196 [99%] [-0.19dB] [on]
+  Side Right: Playback 196 [99%] [-0.19dB] [on]
+Simple mixer control 'PCM',0
+  Capabilities: cvolume cswitch cswitch-joined
+  Capture channels: Front Left - Front Right
+  Limits: Capture 0 - 6928
+  Front Left: Capture 4096 [59%] [-0.01dB] [on]
+  Front Right: Capture 4096 [59%] [-0.01dB] [on]
+Simple mixer control 'PCM Capture Source',0
+  Capabilities: enum
+  Items: 'Mic' 'Line' 'IEC958 In' 'Mixer'
+  Item0: 'Line'
+Simple mixer control 'Line',0
+  Capabilities: pvolume cvolume pswitch pswitch-joined cswitch cswitch-joined
+  Playback channels: Front Left - Front Right
+  Capture channels: Front Left - Front Right
+  Limits: Playback 0 - 8065 Capture 0 - 6928
+  Front Left: Playback 4781 [59%] [-5.33dB] [off] Capture 4507 [65%] [1.60dB] [on]
+  Front Right: Playback 4781 [59%] [-5.33dB] [off] Capture 4507 [65%] [1.60dB] [on]
+Simple mixer control 'Mic',0
+  Capabilities: pvolume cvolume pswitch pswitch-joined cswitch cswitch-joined
+  Playback channels: Front Left - Front Right
+  Capture channels: Front Left - Front Right
+  Limits: Playback 0 - 8065 Capture 0 - 6928
+  Front Left: Playback 5046 [63%] [-4.30dB] [off] Capture 2451 [35%] [-6.43dB] [on]
+  Front Right: Playback 5046 [63%] [-4.30dB] [off] Capture 2451 [35%] [-6.43dB] [on]
+Simple mixer control 'IEC958 In',0
+  Capabilities: cswitch cswitch-joined
+  Capture channels: Mono
+  Mono: Capture [on]
+The above output from the amixer scontrols and amixer sdevices command shows the following;
+The 'Speaker' is actually a 7.1 Surround Sound USB Audio Device with several physical AUX / 1/8" / 3.5mm Output Jacks
+The 'PCM' is a "CAPTURE" Device that does absolutely nothing on this device
+The 'PCM Capture Source' is the currently selected input / source (mic, line, or SPDIF)
+The 'Line' is represented physically by an AUX / 1/8" / 3.5mm Input Jack ("traditionally" blue)
+The 'Mic' is represented physically by an AUX / 1/8" / 3.5mm Input Jack ("traditionally" pink), and on this device, there are actually two physical Jacks, but the software doesn't know this because the Jacks are simply wired in parallel.
+The 'IEC958' is represented physically by the SPDIF Jack for a Fiber Optic Cable
+...and for this device, the SPDIF output isn't represented to software and apparently is just 'wired' up like a "monitor", where it gets constant full output and cannot be controlled in software (oh, well)
+</syntaxhighlight>
 <br />