<p>Partial list of albums</p>
<ul>
<li>Journey - Frontiers</li>
<li>Journey - Evolution</li>
<li>Journey - Greatest Hits</li>
<li>Journey - Departure</li>
<li>Chicago - 2 albums - unknown titles</li>
<li>John Denver - Rocky Mountain Christmas</li>
<li>Inside Star Trek (1976)
<ul>
<li>SIDE I Inside Star Trek Star Trek Theme William Shatner Meets Captain Kirk The Origin of Spock Sarek's Son Spock The Questor Affair</li>
<li>SIDE II The Enterprise Runs Aground McCoy's Rx for Life The Star Trek Philosophy Asimov's World of Science Fiction A Letter From a Network Censor The Star Trek Dream Ballad I/Ballad II)*</li>
</ul></li>
</ul>
<p><em>Inside Star Trek album: Cover</em><br />
<a href="https://hackerpublicradio.org/eps/hpr3507/image_001.png"><img
src="https://hackerpublicradio.org/eps/hpr3507/image_001_thumbnail.png"
alt="Inside Star Trek album: Cover" /></a> <br/><small><small><em>Click the
thumbnail to see the full-sized image</em></small></small> -  -  </p>
<p><em>Inside Star Trek album: Contents</em><br />
<a href="https://hackerpublicradio.org/eps/hpr3507/image_002.png"><img src="https://hackerpublicradio.org/eps/hpr3507/image_002_thumbnail.png" alt="Inside Star Trek album: Contents" /></a> <br/><small><small><em>Click the thumbnail to see the full-sized image</em></small></small> -  - </p>
<p>I found a turntable at the thrift store, and the spindle ran, but the platter did not. The belt had slipped off, and here is the fix.</p>
<ul>
<li><a href="https://www.youtube.com/watch?app=desktop&amp;v=rXkOoaIVsvE" class="uri">https://www.youtube.com/watch?app=desktop&amp;v=rXkOoaIVsvE</a></li>
</ul>
<p><em>How to remove platter</em><br />
<a href="https://hackerpublicradio.org/eps/hpr3507/image_003.png"><img src="https://hackerpublicradio.org/eps/hpr3507/image_003_thumbnail.png" alt="How to remove platter" /></a> <br/><small><small><em>Click the thumbnail to see the full-sized image</em></small></small> -  - </p>
<p><em>Belt placement</em><br />
<a href="https://hackerpublicradio.org/eps/hpr3507/image_004.png"><img src="https://hackerpublicradio.org/eps/hpr3507/image_004_thumbnail.png" alt="Belt placement" /></a> <br/><small><small><em>Click the thumbnail to see the full-sized image</em></small></small> -  - </p>
<h2 id="routing-audio-from-a-usb-turntable-to-hdmi-using-a-raspberry-pi">Routing Audio from a USB Turntable to HDMI using a Raspberry Pi</h2>
<ul>
<li><a href="https://www.rickmakes.com/routing-audVmmsio-from-a-usb-turntable-to-hdmi-using-a-raspberry-pi" class="uri">https://www.rickmakes.com/routing-audVmmsio-from-a-usb-turntable-to-hdmi-using-a-raspberry-pi</a></li>
</ul>
<p>Send input to output</p>
<pre><code>alsaloop -t 500000 -C hw:CARD=CODEC,DEV=0 -P default:CARD=b1</code></pre>
<h2 id="alsaloop-man-page">alsaloop man page</h2>
<ul>
<li><p><a href="https://linux.die.net/man/1/alsaloop" class="uri">https://linux.die.net/man/1/alsaloop</a></p>
<p>-t <usec> | --tlatency=<usec> Requested latency in usec (1/1000000sec).</p></li>
</ul>
<p>Parameter b1 is found by</p>
<pre><code>pi@retropie:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]</code></pre>
<h2 id="raspberry-pi-as-a-usb-audio-capture-device">Raspberry Pi as a USB audio capture device</h2>
<ul>
<li><p><a href="https://scruss.com/blog/2012/11/20/raspberry-pi-as-a-usb-audio-capture-device" class="uri">https://scruss.com/blog/2012/11/20/raspberry-pi-as-a-usb-audio-capture-device</a></p>
<p>arecord -D 'pulse' -V stereo -c 2 -f dat -d 900 out.wav</p>
<p>arecord -D 'hw:CARD=CODEC,DEV=0' -V stereo -c 2 -f dat -d 900 out.wav</p></li>
</ul>
<p>Used <code>hw:CARD=CODEC,DEV=0</code> derived from 'arecord -L'</p>
<pre><code>hw:CARD=CODEC,DEV=0
USB Audio CODEC, USB Audio
Direct hardware device without any conversions</code></pre>
<h2 id="arecord-man-page">arecord man page</h2>
<ul>
<li><a href="https://linux.die.net/man/1/arecord" class="uri">https://linux.die.net/man/1/arecord</a></li>
</ul>
<pre><code>   -D, --device=NAME
    Select PCM by name
    -V, --vumeter=TYPE
    Specifies the VU-meter type, either stereo or mono. The stereo VU-meter is available only for 2-channel stereo samples with interleaved format.
    -c, --channels=#
    The number of channels. The default is one channel. Valid values are 1 through 32.
    -f --format=FORMAT
    Sample format
    Recognized sample formats are: S8 U8 S16_LE S16_BE U16_LE U16_BE S24_LE S24_BE U24_LE U24_BE S32_LE S32_BE U32_LE U32_BE FLOAT_LE FLOAT_BE FLOAT64_LE FLOAT64_BE IEC958_SUBFRAME_LE IEC958_SUBFRAME_BE MU_LAW A_LAW IMA_ADPCM MPEG GSM SPECIAL S24_3LE S24_3BE U24_3LE U24_3BE S20_3LE S20_3BE U20_3LE U20_3BE S18_3LE S18_3BE U18_3LE
    Some of these may not be available on selected hardware
    The available format shortcuts are:

    -f cd (16 bit little endian, 44100, stereo) [-f S16_LE -c2 -r44100]
    -f cdr (16 bit big endian, 44100, stereo) [-f S16_BE -c2 -f44100]
    -f dat (16 bit little endian, 48000, stereo) [-f S16_LE -c2 -r48000]</code></pre>
<h2 id="recording-to-flac">Recording to FLAC</h2>
<ul>
<li><a href="https://unix.stackexchange.com/questions/583892/how-can-one-record-mic-audio-straight-to-a-flac-file" class="uri">https://unix.stackexchange.com/questions/583892/how-can-one-record-mic-audio-straight-to-a-flac-file</a></li>
</ul>
<p>How can one record mic audio straight to a FLAC file?</p>
<pre><code>ffmpeg -f alsa -ar 48000 -ac 1 -i hw:0 testfile.flac</code></pre>
<h3 id="took-out-the--ac-1-which-downmixed-the-input-to-mono">Took out the "-ac 1", which downmixed the input to mono</h3>
<p>Change hw:0 to hw:2 based on</p>
<pre><code>pi@retropie:~/vinyl $ arecord -l
**** List of CAPTURE Hardware Devices ****
card 2: USB20 [AV TO USB2.0], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0

ffmpeg -f alsa -ar 48000 -i hw:2 testfile_stereo.flac</code></pre>
<h2 id="ffmpeg-audio-channel-manipulation">FFmpeg Audio Channel Manipulation</h2>
<ul>
<li><a href="https://trac.ffmpeg.org/wiki/AudioChannelManipulation" class="uri">https://trac.ffmpeg.org/wiki/AudioChannelManipulation</a></li>
</ul>
