From d580db939235f0de06344d203454529adc184a93 Mon Sep 17 00:00:00 2001 From: Liz Upton Date: Fri, 14 Oct 2022 14:47:49 +0100 Subject: [PATCH 1/2] Style, rewording A spot of edit for length too. --- .../asciidoc/accessories/iqaudio/faq.adoc | 52 +++++++++---------- 1 file changed, 25 insertions(+), 27 deletions(-) diff --git a/documentation/asciidoc/accessories/iqaudio/faq.adoc b/documentation/asciidoc/accessories/iqaudio/faq.adoc index 3da9309a1..08b6a5484 100644 --- a/documentation/asciidoc/accessories/iqaudio/faq.adoc +++ b/documentation/asciidoc/accessories/iqaudio/faq.adoc @@ -1,13 +1,12 @@ -=== Saving alsamixer settings +=== Saving AlsaMixer settings -Storing the alsamixer setting can be achieved by performing the following at the command line: +To store the AlsaMixer setting, add the following at the command line: ---- $ sudo alsactl store ---- -It is possible to save the current state to a file, then reload that state at startup (very useful for the -Codec boards and use cases) +You can save the current state to a file, then reload that state at startup. To save: @@ -24,24 +23,23 @@ $ sudo alsactl restore -f /home/pi/usecase.state === Using external USB devices If you want to enable 1.2 amp USB support (to allow USB hard disks to power up when -accessory boards are in use) then you may also want to add the following line to your `/boot/config.txt` +accessory boards are in use), you may also want to add the following line to your `/boot/config.txt` file: ---- max_usb_current=1 ---- -Please ensure your Raspberry Pi power supply is able to deliver a minimum of 2.5 amps if you are powering via mini USB and -enable `max_usb_current`. +Please ensure your Raspberry Pi power supply is able to deliver a minimum of 2.5 amps if you are powering via mini USB, and enable `max_usb_current`. -=== MPD based audio with volume control +=== MPD-based audio with volume control -To allow MPD (Music Player Daemon) based audio software to control the audio board’s built in volume the file -`/etc/mpd.conf` may need to be changed to support the correct ALSA mixer name. +To allow Music Player Daemon (MPD)-based audio software to control the audio board’s built in volume, the file +`/etc/mpd.conf` may need to be changed to support the correct AlsaMixer name. -This can be achieved by ensuring the 'Audio Output' section of `/etc/mpd.conf` has the 'mixer_control' -line. Below is an example for the Texas Instruments based boards (DAC -PRO/DAC{plus}/DigiAMP{plus}) +This can be achieved by ensuring the 'Audio output' section of `/etc/mpd.conf` has the 'mixer_control' +line. Below is an example for the Texas Instruments-based boards (DAC +PRO/DAC{plus}/DigiAMP{plus}): ---- audio_output { @@ -53,17 +51,17 @@ audio_output { === Hardware information -* PCB screws are all m2.5 -* PCB standoffs (for CASE) are 5mm male / female -* PCB standoffs (for Raspberry Pi to audio products) are 9mm female / female -* PCB standoffs (for XLR to DAC PRO) are 8mm female / male -* PCB standoffs (for the official Raspberry Pi 7-inch display) are 5mm male / female -* The rotary encoders we have used and tested are the ALPHA 3 pin Rotary Encoder -RE160F-40E3-20A-24P, the ALPS EC12E2430804 (RS: 729-5848), the Bourns ECW0JB24-AC0006L (RS: 263-2839) -* The Barrel connector used for powering the DigiAMP+ is 2.5mmID, 5.5mmOD, 11mm -* The DigiAMP{plus} is designed to operate with a 12v 3amp to 24v supply such as the XPPower -VEC65US19 or similar -* The DigiAMP{plus} uses CamdenBoss two part connectors. Those fitted to the PCB are: -CTBP9350/2AO -* The speaker terminal used on the Codec Zero will accept wires of between 14 ~ 26 AWG -(wire of max 1.6mm in diameter) \ No newline at end of file +* PCB screws are all m2.5. +* PCB standoffs (for case) are 5mm male/female. +* PCB standoffs (for Raspberry Pi to audio products) are 9mm female/female. +* PCB standoffs (for XLR to DAC PRO) are 8mm female/male. +* PCB standoffs (for the official Raspberry Pi 7-inch display) are 5mm male/female. +* The rotary encoders we have used and tested are the Alpha three-pin rotary encoder +RE160F-40E3-20A-24P, the ALPS EC12E2430804 (RS: 729-5848), and the Bourns ECW0JB24-AC0006L (RS: 263-2839). +* The barrel connector used for powering the DigiAMP{plus} is 2.5mmID, 5.5mmOD, 11mm. +* The DigiAMP{plus} is designed to operate with a 12V to 24V, 3A supply such as the XPPower +VEC65US19 or similar. +* The DigiAMP{plus} uses CamdenBoss two-part connectors. Those fitted to the PCB are +CTBP9350/2AO. +* The speaker terminal used on the Codec Zero will accept wires of between 14~26 AWG +(wire of max 1.6mm in diameter). From 4eb5fcf834a7a6360db507c71563d855326acdc8 Mon Sep 17 00:00:00 2001 From: Liz Upton Date: Tue, 18 Oct 2022 18:00:03 +0100 Subject: [PATCH 2/2] Update faq.adoc --- documentation/asciidoc/accessories/iqaudio/faq.adoc | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/documentation/asciidoc/accessories/iqaudio/faq.adoc b/documentation/asciidoc/accessories/iqaudio/faq.adoc index 08b6a5484..6d75868b0 100644 --- a/documentation/asciidoc/accessories/iqaudio/faq.adoc +++ b/documentation/asciidoc/accessories/iqaudio/faq.adoc @@ -1,6 +1,6 @@ === Saving AlsaMixer settings -To store the AlsaMixer setting, add the following at the command line: +To store the AlsaMixer settings, add the following at the command line: ---- $ sudo alsactl store @@ -30,7 +30,6 @@ file: max_usb_current=1 ---- -Please ensure your Raspberry Pi power supply is able to deliver a minimum of 2.5 amps if you are powering via mini USB, and enable `max_usb_current`. === MPD-based audio with volume control @@ -51,9 +50,9 @@ audio_output { === Hardware information -* PCB screws are all m2.5. +* PCB screws are all M2.5. * PCB standoffs (for case) are 5mm male/female. -* PCB standoffs (for Raspberry Pi to audio products) are 9mm female/female. +* PCB standoffs (for Raspberry Pi to audio boards) are 9mm female/female. * PCB standoffs (for XLR to DAC PRO) are 8mm female/male. * PCB standoffs (for the official Raspberry Pi 7-inch display) are 5mm male/female. * The rotary encoders we have used and tested are the Alpha three-pin rotary encoder