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<title>suspect-devices/circuitpython/shared-module/audioio, branch 4.0.0-alpha.3</title>
<subtitle>CircuitPython - a Python implementation for teaching coding with microcontrollers</subtitle>
<id>https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=4.0.0-alpha.3</id>
<link rel='self' href='https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=4.0.0-alpha.3'/>
<link rel='alternate' type='text/html' href='https://git.suspectdevices.com/suspect-devices/circuitpython/'/>
<updated>2018-11-01T01:08:10+00:00</updated>
<entry>
<title>add channels and bits_per_sample to audioio.WaveFile</title>
<updated>2018-11-01T01:08:10+00:00</updated>
<author>
<name>caternuson</name>
<email>caternuson@gmail.com</email>
</author>
<published>2018-11-01T01:08:10+00:00</published>
<link rel='alternate' type='text/html' href='https://git.suspectdevices.com/suspect-devices/circuitpython/commit/?id=46f1a0719e5d24d0a53e64a01a667610c6c57086'/>
<id>urn:sha1:46f1a0719e5d24d0a53e64a01a667610c6c57086</id>
<content type='text'>
</content>
</entry>
<entry>
<title>Rename stop to stop_voice in case we want stop to stop everything later.</title>
<updated>2018-10-09T20:28:00+00:00</updated>
<author>
<name>Scott Shawcroft</name>
<email>scott@tannewt.org</email>
</author>
<published>2018-10-09T20:28:00+00:00</published>
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<id>urn:sha1:6da25c8893afedfc195327f597fd3b0b45fc65d8</id>
<content type='text'>
</content>
</entry>
<entry>
<title>Fix M0 math</title>
<updated>2018-10-05T22:19:09+00:00</updated>
<author>
<name>Scott Shawcroft</name>
<email>scott@tannewt.org</email>
</author>
<published>2018-10-05T21:43:27+00:00</published>
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<id>urn:sha1:3c6812f2c1c900b4b6fd52bc9a5ee3b6f483626f</id>
<content type='text'>
</content>
</entry>
<entry>
<title>Fix voice ending in the middle of a buffer.</title>
<updated>2018-10-05T22:19:08+00:00</updated>
<author>
<name>Scott Shawcroft</name>
<email>scott@tannewt.org</email>
</author>
<published>2018-10-05T20:00:22+00:00</published>
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<id>urn:sha1:8587d8edf0a794644783e26ac243d1ba141a85ca</id>
<content type='text'>
</content>
</entry>
<entry>
<title>Introduce audioio.Mixer which can mix multiple audio samples</title>
<updated>2018-10-05T22:12:23+00:00</updated>
<author>
<name>Scott Shawcroft</name>
<email>scott@tannewt.org</email>
</author>
<published>2018-10-03T01:06:52+00:00</published>
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<id>urn:sha1:76008ce304e09394733a10d56b944218b41630ca</id>
<content type='text'>
to produce a single sample.

Only works with 16 bit samples on the M4.

Fixes #987
</content>
</entry>
<entry>
<title>Compress all translated strings with Huffman coding.</title>
<updated>2018-08-17T00:40:57+00:00</updated>
<author>
<name>Scott Shawcroft</name>
<email>scott@tannewt.org</email>
</author>
<published>2018-08-16T01:32:37+00:00</published>
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<id>urn:sha1:de5a9d72dcdaacdd5048195cd5bab007f4b2baef</id>
<content type='text'>
This saves code space in builds which use link-time optimization.
The optimization drops the untranslated strings and replaces them
with a compressed_string_t struct. It can then be decompressed to
a c string.

Builds without LTO work as well but include both untranslated
strings and compressed strings.

This work could be expanded to include QSTRs and loaded strings if
a compress method is added to C. Its tracked in #531.
</content>
</entry>
<entry>
<title>Support internationalisation.</title>
<updated>2018-08-07T21:58:57+00:00</updated>
<author>
<name>Scott Shawcroft</name>
<email>scott@tannewt.org</email>
</author>
<published>2018-07-31T23:53:54+00:00</published>
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<id>urn:sha1:933add6cd833bb6ba6682ad2b6eb478871415ff5</id>
<content type='text'>
</content>
</entry>
<entry>
<title>Fix playing audio from SD card</title>
<updated>2018-06-14T22:47:40+00:00</updated>
<author>
<name>Dan Halbert</name>
<email>halbert@halwitz.org</email>
</author>
<published>2018-06-14T22:47:40+00:00</published>
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<id>urn:sha1:e724bc1c4eb1224aa043a1489b29ec3daaa832aa</id>
<content type='text'>
</content>
</entry>
<entry>
<title>Add audio output support!</title>
<updated>2018-04-12T23:35:13+00:00</updated>
<author>
<name>Scott Shawcroft</name>
<email>scott.shawcroft@gmail.com</email>
</author>
<published>2018-03-12T23:09:13+00:00</published>
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<id>urn:sha1:28642ab10d6b32fe91dce916d6d57e1b5b9607bc</id>
<content type='text'>
This evolves the API from 2.x (and breaks it). Playback devices are now
separate from the samples themselves. This allows for greater playback
flexibility. Two sample sources are audioio.RawSample and audioio.WaveFile.
They can both be mono or stereo. They can be output to audioio.AudioOut or
audiobusio.I2SOut.

Internally, the dma tracking has changed from a TC counting block transfers
to an interrupt generated by the block event sent to the EVSYS. This reduces
the overhead of each DMA transfer so multiple can occure without using up TCs.

Fixes #652. Fixes #522. Huge progress on #263
</content>
</entry>
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