Delete Wave_Player directory

Wave_Player/ReadMe.md

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-Needs the [WAV Player application](https://github.com/flipperdevices/flipperzero-firmware/tree/zlo/wav-player/applications/wav_player) compiled into firmware. Original code from [Zlo](https://github.com/flipperdevices/flipperzero-firmware/tree/zlo/wav-player) and most files provided by [RogueMaster](https://github.com/RogueMaster).
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-Create a wav_player folder in the root of your SD card. You'll need **8-bit, 2 channel, unsigned WAV files** (try [Audacity](https://www.audacityteam.org/) for conversion.)
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-WAV Player is very particular about the format. WavPlayer needs BitExact, NO headers, 48k PCM, unsigned, 2 channel, 8-bit stereo. Example:
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-`Input #0, wav, from '.\rickroll.wav':`<br>
-`  Duration: 00:02:03.38, bitrate: 768 kb/s`<br>
-`    Stream #0:0: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 48000 Hz, stereo, u8, 768 kb/s`
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-To produce a compatible file, you can also use [FFmpeg](https://ffmpeg.org/):<br>
-`ffmpeg -i .\input.mp3 -c:a pcm_u8 -fflags +bitexact -flags:a +bitexact -ac 2 -ar 48k output.wav`