{"id":4982,"date":"2016-07-31T23:22:43","date_gmt":"2016-07-31T14:22:43","guid":{"rendered":"https:\/\/y2tech.net\/blog\/?p=4982"},"modified":"2016-07-31T23:32:58","modified_gmt":"2016-07-31T14:32:58","slug":"lightmpd-rpi-network-player","status":"publish","type":"post","link":"https:\/\/y2tech.net\/blog\/audio\/digital-audio\/lightmpd-rpi-network-player-4982\/","title":{"rendered":"lightMPD \u306b\u3088\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30aa\u30fc\u30c7\u30a3\u30aa"},"content":{"rendered":"

lightMPD + Raspberry Pi + I2S DAC \u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30aa\u30fc\u30c7\u30a3\u30aa\u30d7\u30ec\u30a4\u30e4\u30fc<\/h3>\r\n
\r\n

Raspberry Pi\u306b\u3088\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30aa\u30fc\u30c7\u30a3\u30aa\u3068\u3057\u3066\u6700\u3082\u30dd\u30d4\u30e5\u30e9\u30fc\u306a\u306e\u306f\u3001volumio \u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308b\u3082\u306e\u3067\u3001Linux\u306e\u77e5\u8b58\u304c\u7121\u304f\u3066\u3082\u305d\u308c\u306a\u308a\u306b\u697d\u3057\u3080\u3053\u3068\u304c\u3067\u304d\u3001\u5df7\u306b\u60c5\u5831\u3082\u6ea2\u308c\u3066\u3044\u308b\u306e\u3067\u5165\u9580\u7528\u3068\u3057\u3066\u306f\u4e01\u5ea6\u826f\u3044\u306e\u304b\u3082\u3057\u308c\u306a\u3044\uff0e\u3057\u304b\u3057\u306a\u304c\u3089OS\u306b\u6c4e\u7528\u7684\u306aLinux\u3092\u7528\u3044\u3066\u3044\u308b\u3053\u3068\u304b\u3089\u3001\u4e00\u822c\u7684\u306a\u30aa\u30fc\u30c7\u30a3\u30aa\u5c02\u7528\u6a5f\u306e\u3088\u3046\u306b\u96fb\u6e90\u30d6\u30c1\u30c3\u3067\u4fee\u4e86\u3068\u3044\u3046\u8a33\u306b\u306f\u3044\u304b\u306a\u3044\uff0e<\/p>\r\n
\r\n

\u30b7\u30b9\u30c6\u30e0\u7d42\u4e86\u6642\u306e\u554f\u984c\u306e\u4ed6\u306b\u3001\u3082\u3046\u4e00\u3064\u30c7\u30b8\u30bf\u30eb\u30aa\u30fc\u30c7\u30a3\u30aa\u6a5f\u5668\u306e\u5236\u5fa1\u7528\u306eOS\u3068\u3057\u3066\u6c4e\u7528\u7684\u306aLinux\u3092\u4f7f\u3046\u5834\u5408\u306b\u554f\u984c\u3068\u306a\u308b\u306e\u304c\u3001OS\u306e\u5404\u30d7\u30ed\u30bb\u30b9\u306e\u5f71\u97ff\u306b\u3088\u308b\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u5236\u5fa1\u306e\u96e3\u3057\u3055\u304c\u6319\u3052\u3089\u308c\u308b\uff0e\u7d44\u307f\u8fbc\u307f\u6a5f\u5668\u7528\u306eOS\u3067\u30b7\u30d3\u30a2\u306a\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u6240\u8b02 Real Time OS \u3068\u547c\u3070\u308c\u308b\u5c02\u7528\u306e\u5236\u5fa1\u7528OS\u304c\u4f7f\u308f\u308c\u3066\u304a\u308a\u3001\u4e00\u5b9a\u6642\u9593\u5185\u306b\u6c7a\u3081\u3089\u308c\u305f\u51e6\u7406\u3092\u6b63\u78ba\u306a\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3060\uff0e<\/p>\r\n
\r\n

\u30c7\u30b8\u30bf\u30eb\u30aa\u30fc\u30c7\u30a3\u30aa\u6a5f\u5668\u3092\u7528\u3044\u3066\u97f3\u697d\u88fd\u4f5c\u3092\u884c\u3063\u3066\u3044\u308b\u65b9\u3005\u306f\u3001\u30c7\u30b8\u30bf\u30eb\u30aa\u30fc\u30c7\u30a3\u30aa\u6a5f\u5668\u306e\u30ec\u30fc\u30c6\u30f3\u30b7\u30fc(Latency\uff09\u3092\u3068\u3066\u3082\u6c17\u306b\u3057\u3066\u3044\u308b\uff0e\u97f3\u697d\u88fd\u4f5c\u306e\u73fe\u5834\u3067\u306f\u30ec\u30fc\u30c6\u30f3\u30b7\u30fc\u3092\u6975\u529b\u5c0f\u3055\u304f\u3059\u308b\u3053\u3068\u304c\u671b\u307e\u308c\u3066\u3044\u308b\uff0e\u6b8b\u5ff5\u306a\u304c\u3089\u4e00\u822c\u7684\u306aLinux OS \u3067\u306f\u3001\u30aa\u30fc\u30c7\u30a3\u30aa\u95a2\u4fc2\u306e\u30d7\u30ed\u30bb\u30b9\u3060\u3051\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u51e6\u7406\u3059\u308b\u3053\u3068\u306f\u96e3\u3057\u3044.\u52ff\u8ad6\u3001volumio\u306a\u3069\u306e\u30aa\u30fc\u30c7\u30a3\u30aa\u5c02\u7528\u306eLinux\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30aa\u30fc\u30c7\u30a3\u30aa\u51e6\u7406\u3068\u306f\u95a2\u4fc2\u306e\u7121\u3044\u30d7\u30ed\u30bb\u30b9\u3092\u6975\u529b\u6392\u9664\u3057\u3066\u3001\u5b89\u5b9a\u3057\u305f\u30aa\u30fc\u30c7\u30a3\u30aa\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u3088\u3046\u306b\u5de5\u592b\u304c\u3055\u308c\u3066\u306f\u3044\u308b\u304c\u3001\u9ad8\u97f3\u8cea\u518d\u751f\u3068\u3044\u3046\u89b3\u70b9\u304b\u3089\u306f\u307e\u3060\u307e\u3060\u4e0d\u5341\u5206\u3060\uff0e<\/p>\r\n
\r\n

\u3053\u308c\u3089\u306eLinux OS \u306e\u6b20\u70b9\u3092\u53d6\u308a\u9664\u3044\u3066\u3001\u9ad8\u97f3\u8cea\u30aa\u30fc\u30c7\u30a3\u30aa\u518d\u751f\u306b\u7279\u5316\u3057\u305f\u8d85\u8efd\u91cfLinux\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u304c\u4eca\u56de\u7d39\u4ecb\u3059\u308b lightMPD<\/a> \u3068\u547c\u3070\u308c\u3066\u3044\u308b\u3082\u306e\u3060\uff0elightMPD\u306e\u7279\u5fb4\u3092\u5e7e\u3064\u304b\u6319\u3052\u308b\u3068\u3001
\r\n
\r\n\u3000\u30fb\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u62e1\u5f35Linux\u30ab\u30fc\u30cd\u30eb
\r\n\u3000\u30fb\u30af\u30ed\u30c3\u30af\u30b8\u30c3\u30bf\u4f4e\u6e1b\u51e6\u7f6e
\r\n\u3000\u30fb\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u30ec\u30fc\u30c8\u5909\u63db\u6a5f\u80fd
\r\n\u3000\u30fb\u30aa\u30f3\u30e1\u30e2\u30eaOS
\r\n\u3000\u30fb\u8d85\u8efd\u91cf
\r\n\u3000\u30fbDSD\u30cd\u30a4\u30c6\u30a3\u30d6\u518d\u751f\u304c\u53ef\u80fd
\r\n\u3000\u30fb\u97f3\u6e90\u306fNAS\u306b\u683c\u7d0d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\uff08\u53ef\u80fd\u3067\u6709\u308c\u3070CIFS\u3067\u306f\u306a\u304fNFS\u3092\u4f7f\u3046\u65b9\u304c\u671b\u307e\u3057\u3044\uff09
\r\n\u3000\u30fb\u5bfe\u5fdc\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\uff08BeagleBone Black, cubox-i4, wand aboard, alix3d2, apu.1c, api 2c, Raspberry Pi 1\u301c3\uff09
\r\n

\r\n\u3000\u52ff\u8ad6\u3001\u4e0a\u8a18\u306e\u7279\u5fb4\u306f\u88cf\u8fd4\u305b\u3070\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u3057\u3066\u306e\u6a5f\u80fd\u306f\u5236\u9650\u3055\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3042\u308a\u3001volumio\u306a\u3069\u306e\u3088\u3046\u306aWebGUI\u306b\u3088\u308b\u64cd\u4f5c\u306f\u671b\u3081\u306a\u3044\uff0e\uff08ympd\u3068\u3044\u3046\u7c21\u5358\u306aWeb GUI\u306f\u4e00\u5fdc\u4f7f\u3048\u308b\u304c\u3001\u5b9f\u7528\u6027\u306f\u4e4f\u3057\u3044\u306e\u3067\u3001\u4ed6\u306e MPD \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\uff09<\/p>\r\n
\r\n
\r\n

lightMPD\u306b\u95a2\u3059\u308b\u60c5\u5831\u306f\u3001\u57fa\u672c\u7684\u306b\u4e0a\u8a18\u306e\u65e5\u672c\u8a9e\u30b5\u30a4\u30c8\uff08\u30c7\u30b8\u30d5\u30a1\u30a4\u306e\u304a\u3068\uff09\u3092\u53c2\u7167\u3059\u308b\u3057\u304b\u306a\u3044\u304c\u3001linux\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306a\u3069\u306e\u77e5\u8b58\u304c\u7121\u3044\u4e00\u822c\u7684\u306a\u30aa\u30fc\u30c7\u30a3\u30aa\u30de\u30cb\u30a2\u306b\u3068\u3063\u3066\u306f\u3053\u306e\u30b5\u30a4\u30c8\u306e\u60c5\u5831\u306f\u3061\u3087\u3063\u3068\u6577\u5c45\u304c\u9ad8\u3044\u304b\u3082\u3057\u308c\u306a\u3044\uff0e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u7d19\uff082015\u5e7412\u6708\u53f7\u300e\u81ea\u5206\u5c02\u7528Linux X \u30e9\u30ba\u30d1\u30a4\u30fb\u30aa\u30fc\u30c7\u30a3\u30aa\u300f\uff09\u306ep.p. 100 \u301c 113 \u306blightMPD\u304c\u8a73\u3057\u304f\u7d39\u4ecb\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u3061\u3089\u3092\u53c2\u8003\u306b\u3059\u308b\u3068\u826f\u3044\u3060\u308d\u3046\uff0e<\/p>\r\n
\r\n

lightMPD\u3092\u81ea\u5206\u306e\u74b0\u5883\u306b\u5408\u308f\u305b\u3066\u62e1\u5f35\u3057\u3088\u3046\u3068\u3057\u3066\u3082\u6b86\u3069\u60c5\u5831\u304c\u516c\u958b\u3055\u308c\u3066\u3044\u306a\u3044\u306e\u3067\u56f0\u96e3\u3060\uff0e\u305b\u3081\u3066lightMPD\u3067\u4f7f\u7528(\u95a2\u4fc2\uff09\u3057\u3066\u3044\u308b\u4e00\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3060\u3051\u3067\u3082\u4e00\u89a7\u3092\u7d39\u4ecb\u3057\u3066\u304f\u308c\u308c\u3070\u826f\u3044\u306e\u3060\u304c\uff0e\uff0e\uff0e\u3000<\/p>\r\n
\r\n

lightMPD\u3092\u4f7f\u3046\u3088\u3046\u306a\u4eba\u9054\u306f\u6975\u9650\u307e\u3067\u97f3\u8cea\u306b\u62d8\u308b\u30b3\u30a2\u306a\u30aa\u30fc\u30c7\u30a3\u30aa\u30de\u30cb\u30a2\u304c\u591a\u3044\u3068\u601d\u308f\u308c\u308b\u304c\u3001lightMPD\u306b\u3088\u308b\u97f3\u306f\u3053\u308c\u307e\u3067\u306eUSB DAC\u306e\u97f3\u3068\u306f\u6b21\u5143\u304c\u7570\u306a\u3063\u3066\u3044\u308b\u3068\u8a00\u3048\u308b\u3060\u308d\u3046\uff0e\u79c1\u306e\u99c4\u8033\u3067\u3082\u305d\u306e\u9055\u3044\u304c\u30cf\u30c3\u30ad\u30ea\u3068\u5206\u304b\u308b\u306e\u3060\u304c\u3001\u4eba\u306b\u3088\u3063\u3066\u306flightMPD\u306e\u97f3\u306f\u92ed\u3059\u304e\u3066\u805e\u304d\u75b2\u308c\u3059\u308b\u304b\u3082\u3057\u308c\u306a\u3044\uff0e<\/p>\r\n
\r\n

\r\n

lightMPD\u306eI2S\u51fa\u529b\u4fe1\u53f7\u3092\u8abf\u3079\u3066\u307f\u305f<\/h4>\r\n
\r\n

lightMPD\u3067\u306fPCM\u97f3\u6e90\u306e\u4ed6\u306b\u3001DSD\u30cd\u30a4\u30c6\u30a3\u30d6\u65b9\u5f0f\u306b\u3082\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u306a\u306e\u3067\u3001\u4eca\u56de\u306fDSD\u5efb\u308a\u306e\u4fe1\u53f7\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u307f\u308b\u3053\u3068\u306b\u3059\u308b\uff0e\u5b9f\u9a13\u306b\u4f7f\u7528\u3057\u305flightMPD\u306e\u30b3\u30f3\u30d5\u30a3\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u306f\u6b21\u306e\u69d8\u306b\u8a2d\u5b9a\u3057\u3066\u3042\u308b\uff0e<\/p>\r\n
\r\n

\u30fb\u3000”config.txt” <\/b><\/p>
\r\n

\r\nkernel=\/boot\/zImage\r\ninitramfs \/boot\/initrd.romfs.gz 0x02000000\r\n#\r\n#\r\ndtoverlay=rpi-dac\r\n#dtoverlay=hifiberry-dac\r\n#dtoverlay=hifiberry-dacplus\r\n#dtoverlay=hifiberry-digi\r\n#dtoverlay=hifiberry-amp\r\n#\r\n#dtoverlay=iqaudio-dac\r\n#dtoverlay=iqaudio-dacplus\r\n#\r\n#dtoverlay=sabreberry32\r\n#dtoverlay=sabreberry32,slave\r\n<\/code><\/pre>\r\n
\r\n
\u203b I2S\u51fa\u529b\u3092\u884c\u3046\u306e\u3067\u3001”rpi-dac” \u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\uff0eUSB\u7d4c\u7531\u3067 USB DAC\u3092\u7e4b\u3050\u5834\u5408\u306f\u3000”dtoverlay”\u3000\u306f”config.txt”\u3067\u306f\u6307\u5b9a\u3057\u306a\u3044\uff0e\uff08 \u6b21\u306e “lightmpd.conf” \u4e2d\u3067 “dac=usb-audio” \u3092\u6307\u5b9a\u3059\u308b )\r\n
\r\n
\r\n
 \u30fb\u3000”lightmpd.conf”  \uff08 \u4e00\u90e8\u3060\u3051\u629c\u7c8b\u3000\uff09<\/b><\/p>
\r\n
\r\n# \r\n[network]\r\n    interface=eth0\r\n    address=192.168.101.21\r\n    netmask=255.255.255.0\r\n    gateway=192.168.101.254\r\n    nameserver=192.168.100.1\r\n    domain=music.home.yoko\r\n[ntp]\r\n    server=ntp.nict.jp\r\n    ntpd=no\r\n    timezone=Asia\/Tokyo\r\n \r\n[nas:NASMusic]\r\n    type=nfs\r\n    host=nas.home.yoko\r\n    remotedir=volume3\/Media\r\n    proto=tcp\r\n    rsize=65536\r\n    wsize=65536\r\n    \r\n  ...\r\n   \r\n#\r\n    dac=rpi-dac\r\n#    dac=usb-audio\r\n#    dac=usb-hiface\r\n# \r\n    load_module=mpd-0.19.10rt-native-dsd\r\n    music_directory=NASMusic\/Sounds\r\n    playlist_directory=NASMusic\/mpd-rpi\/playlists\r\n    db_file=NASMusic\/mpd-rpi\/tag_cache\r\n    sticker_file=NASMusic\/mpd-rpi\/sticker.sql\r\n#    log_file=NASMusic\/mpd-rpi\/mpd.log\r\n    log_file=\/dev\/null\r\n \r\n<\/code><\/pre>\r\n
\r\n
\r\n
 \u30fb\u3000”mpd.conf” \uff08 \u4e00\u90e8\u3060\u3051\u629c\u7c8b\u3000\uff09\u3000<\/b><\/p>
\r\n
\r\n \r\naudio_output {\r\n    type                \"alsa\"\r\n    name                \"uda\"\r\n    device              \"hw:0,0\"        # optional\r\n    priority            \"FIFO:54\"       # optional\r\n    mixer_type          \"disabled\"\r\n#    mixer_control      \"Playback Digital\"\r\n    dsd_usb             \"no\"\r\n#    dsd_usb            \"yes\"\r\n    dsd_native          \"yes\"\r\n    dsd_native_type     \"2\"\r\n    buffer_time         \"150000\"\r\n    period_time         \"37500\"\r\n}\r\n \r\n<\/code><\/pre>\r\n
\r\n
\u203b  dsd_usb=”no” \u2192 DSD Native \u51fa\u529b\uff08\u3053\u3053\u3067\u306e Native\u306e\u610f\u5473\u306f DoP\u3067\u306f\u306a\u3044\u3068\u3044\u3046\u610f\u5473\uff09
\r\n\u3000 dsd_usb=”yes” \u2192 DSD DoP \u51fa\u529b\uff08\uff09
\r\n
\r\n\u3000\u3000dsd_native\t\t“yes”\u3000\u3000PCM \u5909\u63db\u306f\u884c\u308f\u306a\u3044
\r\n\u3000\u3000dsd_native_type\t“2”\u3000\u3000\u3000\u4f55\u6545\u304b “2”\u3000\u4ee5\u5916\u3092\u6307\u5b9a\u3059\u308b\u3068 DSD\/PCM \u5909\u63db\u3055\u308c\u3066\u3057\u307e\u3046? 
\r\n
\r\n
\r\n
\r\n\"PCM 
\r\nPCM 48kHz 16bit \uff08\u5de6\u5074\uff1a \u4e0a LRCK\u3001 \u4e0b BCK – x64FS\u3001\u3000\u53f3\u5074\uff1a \u4e0a LRCK\u3001\u3000\u4e0b DATA\u3000)\r\n
\r\n<\/div>\r\n
\r\n
\r\n
PCM\u306e\u518d\u751f\u306f192KHz\u307e\u3067\u306f\u518d\u751f\u53ef\u80fd\u3060\u304c\u3001\u79c1\u306e\u74b0\u5883\u3067\u306f\u6642\u3005\u97f3\u304c\u9014\u5207\u308c\u3066\u30d7\u30c1\u30ce\u30a4\u30ba\u304c\u767a\u751f\u3059\u308b\u4e8b\u304c\u3042\u3063\u305f\u306e\u3067\u3001\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u7b49\u306e\u8abf\u6574\u304c\u5fc5\u8981\u304b\u3082\u3057\u308c\u306a\u3044\uff0eRaspberry Pi\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u74b0\u5883\u3082\u5f71\u97ff\u3057\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u306a\u3044\uff0e352kHz\u306ePCM\u306fALSA\u30c9\u30e9\u30a4\u30d0\u304c\u4e0a\u9650\u3092192KHz\u306b\u5236\u9650\u3057\u3066\u3044\u308b\u95a2\u4fc2\u3067\u518d\u751f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\uff0eALSA\u30c9\u30e9\u30a4\u30d0\u5efb\u308a\u3092\u4fee\u6b63\u3057\u3066\u30ab\u30fc\u30cd\u30eb\u3092\u518d\u69cb\u7bc9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3060\u308d\u3046\uff0e<\/p>\r\n
\r\n
\r\n
\r\n\"DSD64
\r\nDSD64(2.8MHz) Native\uff08\u5de6\u5074\uff1a \u4e0a LRCK\u3001\u3000\u4e0b DATA\u3000)\r\n
\r\n
\r\n\"DSD64
\r\nDSD64(2.8MHz) Native\uff08\u5de6\u5074\uff1a \u4e0a BCK\u3001\u3000\u4e0b DATA\u3000)\r\n
\r\n
\r\n\"DSD 
\r\nDSD128(5.6MHz) Native\uff08\u5de6\u5074\uff1a \u4e0a LRCK\u3001\u3000\u4e0b DATA\u3000)\r\n
\r\n
\r\n\"DSD256 
\r\nDSD256(11.2MHz) Native\uff08\u5de6\u5074\uff1a \u4e0a LRCK\u3001\u3000\u4e0b DATA\u3000)\r\n
\r\n<\/div>\r\n
\r\n
\u4e0a\u8a18\u306e4\u679a\u306e\u753b\u50cf\u306f\u3001DSD Native \u30e2\u30fc\u30c9\u3067\u51fa\u529b\u5148\u3092I2S\u306b\u3057\u305f\u5834\u5408\u306e\u3082\u306e\u3060\uff0eLRCK, BCK, DATA \u306fPCM\u30e2\u30fc\u30c9\u306e\u4fe1\u53f7\u30d4\u30f3\u306e\u8868\u8a18\u3092\u4fbf\u5b9c\u4e0a\u305d\u306e\u307e\u307e\u8a18\u8f09\u3057\u3066\u3044\u308b\uff0eDSD64(2.8MHz)\u306e\u518d\u751f\u6642\u306b\u306f\u3001LRCK\u30d4\u30f3\u306b 88.2KHz\u306e\u30af\u30ed\u30c3\u30af\u4fe1\u53f7\u304c\u51fa\u529b\u3055\u308c\u3001BCK\u30d4\u30f3\u306b\u306f5.6MHz(x64Fs\uff09\u306e\u30af\u30ed\u30c3\u30af\u304c\u51fa\u3066\u3044\u308b\uff0e\u4e00\u65b9DATA\u30d4\u30f3\u306fLRCK\u30d4\u30f3\u306e\u534a\u5468\u671f\u6bce\u306b24bit\u5358\u4f4d\u30671\u30d3\u30c3\u30c8\u30b9\u30c8\u30ea\u30fc\u30e0\u30c7\u30fc\u30bf\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u308b\uff0e\u3069\u3046\u3084\u3089\u3053\u306e\u4fe1\u53f7\u306f\u672c\u6765\u306a\u3089 XMOS \u306a\u3069\u306eUSB DDC \u306b\u51fa\u529b\u3059\u308b Native DSD\u4fe1\u53f7\u306e\u3088\u3046\u3060\uff0e\u3053\u306e\u4fe1\u53f7\u306f DAC \u304c\u53d7\u3051\u53d6\u308bDSD\u30d3\u30c3\u30c8\u30b9\u30c8\u30ea\u30fc\u30e0\u4fe1\u53f7\u3068\u3082\u7570\u306a\u308b\u306e\u3067\u3001\u3053\u306e\u4fe1\u53f7\u3092\u305d\u306e\u307e\u307e DAC \u306eDSD\u5165\u529b\u3068\u3057\u3066\u6e21\u3059\u3053\u3068\u3082\u3067\u304d\u306a\u3044\uff0eDSD256(11.2MHz)\u306e\u5834\u5408\u306f\u5358\u7d14\u306bLRCK\u306e\u5468\u6ce2\u6570\u306f352.4KHz\u306b\u306a\u308a\u305d\u3046\u3060\u304c\u3001ALSA\u30c9\u30e9\u30a4\u30d0\u306e\u4e0a\u9650\u306e192KHz\u306b\u5f15\u3063\u639b\u304b\u3063\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u3088\u3046\u3060\uff0e<\/p>\r\n
\r\n
\r\n
\r\n\"DSD64 
\r\nDSD64(2.8MHz) DoP\uff08\u5de6\u5074\uff1a \u4e0a LRCK\u3001\u3000\u4e0b DATA\u3000)\r\n
\r\n<\/div>\r\n
\r\n
\u3053\u306e\u753b\u50cf\u306f\u3001DSD64(2.8MHz)\u3092DSD DoP \u30e2\u30fc\u30c9\u3067\u51fa\u529b\u5148\u3092I2S\u306b\u3057\u305f\u5834\u5408\u306e\u3082\u306e\u3060\uff0eDSD64(2.8MHz)\u306eDoP\u30e2\u30fc\u30c9\u3067\u306e\u518d\u751f\u6642\u306b\u306f\u3001LRCK\u30d4\u30f3\u306b 176.4KHz\u306e\u30af\u30ed\u30c3\u30af\u4fe1\u53f7\u304c\u51fa\u529b\u3055\u308c\u3001BCK\u30d4\u30f3\u306b\u306f11.2MHz(x64Fs\uff09\u306e\u30af\u30ed\u30c3\u30af\u304c\u51fa\u3066\u3044\u308b\uff0e\u4e00\u65b9DATA\u30d4\u30f3\u306fLRCK\u30d4\u30f3\u306e\u534a\u5468\u671f\u6bce\u306bDoP\u30de\u30fc\u30ab(0x05\/0xFA)\u306e8bit\u30c7\u30fc\u30bf\u3068\u5171\u306b\u306b16bit\u5358\u4f4d\u306e1\u30d3\u30c3\u30c8\u30b9\u30c8\u30ea\u30fc\u30e0\u30c7\u30fc\u30bf\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\uff0e\u52ff\u8ad6\u3053\u306e\u30c7\u30fc\u30bf\u3092\u305d\u306e\u307e\u307ePCM\u4fe1\u53f7\u3068\u3057\u3066\u518d\u751f\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u306e\u3067\u3001DoP\u4fe1\u53f7\u3092DSD\u306e1\u30d3\u30c3\u30c8\u30b9\u30c8\u30ea\u30fc\u30e0\u30c7\u30fc\u30bf\u3078\u5909\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\uff0eAK4137\u306b\u306fDoP\u304b\u3089DSD\u3078\u306e\u5909\u63db\u30e2\u30fc\u30c9\u304c\u3042\u308b\u306e\u3067\u3001AK4137\u3092DSD DAC\u306e\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u306b\u4f7f\u3046\u3068\u3044\u3046\u624b\u3082\u3042\u308a\u3060\u308d\u3046\uff0e<\/p>\r\n
\r\n
DoP\u65b9\u5f0f\u3067\u306e DSD128\uff085.6MHz\uff09\u306e\u518d\u751f\u3092\u884c\u3046\u5834\u5408\u306f\u5358\u7d14\u306b LRCK\u3092352.8KHz \u306b\u4e0a\u3052\u308c\u3070\u826f\u3044\u306e\u3060\u304c\u3001Raspberry Pi \u306eALSA \u30c9\u30e9\u30a4\u30d0\u3067\u306ePCM\u65b9\u5f0f\u306e\u6700\u9ad8\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u5468\u6ce2\u6570\u306f 192KHz\u306b\u5236\u9650\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001DoP\u65b9\u5f0f\u3067\u306e DSD128\uff085.6MHz\uff09\u306e\u518d\u751f\u3092\u884c\u3046\u5834\u5408\u306fALSA \u30c9\u30e9\u30a4\u30d0\u3092\u66f8\u304d\u63db\u3048\u3066\u3001352.8KHz \u306b\u5bfe\u5fdc\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\uff0e\uff08DENON \u306eDA-300USB\u306ePCM\u306e\u4e0a\u9650\u306f192KHz\u306b\u6291\u3048\u3089\u308c\u3066\u3044\u308b\u304c\u3001PCM\u30e2\u30fc\u30c9\u3067352.4KHz\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u306e\u306f\u3001DoP\u65b9\u5f0f\u3067DSD128\u3092\u518d\u751f\u3055\u305b\u308b\u305f\u3081\u306e\u30c0\u30df\u30fc)<\/p>\r\n
\r\n
lightMPD\u306b\u3088\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ec\u30fc\u30e4\u30fc\u306e\u5834\u5408\u3001PCM\u7cfb\u3067\u6709\u308c\u3070 192KHz\u307e\u3067\u3001DSD\u30cd\u30a4\u30c6\u30a3\u30d6\u518d\u751f\u3067\u6709\u308c\u3070 DSD64(2.8MHz) \u307e\u3067\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308b\u3060\u308d\u3046\uff0eI2S\u65b9\u5f0f\u306eDAC\u30ab\u30fc\u30c9\u3067\u30cd\u30a4\u30c6\u30a3\u30d6DSD\u65b9\u5f0f\u306b\u5bfe\u5fdc\u3055\u305b\u308b\u306e\u306f\u96e3\u3057\u3044\u306e\u3067\u3001lightMPD\u306e\u5834\u5408\u306f\u4e00\u65e6USB\u51fa\u529b\u3055\u305b\u3066\u3001XMOS\u3084Amanero384\u7b49\u306eUSB DDC\u7d4c\u7531\u3067DSD \u5bfe\u5fdcDAC\u306b\u7e4b\u3050\u3068\u3044\u3046\u306e\u304c\u7121\u96e3\u306a\u65b9\u6cd5\u3060\uff0e<\/p>\r\n
\r\n
\r\n
\u53c2\u8003\u60c5\u5831<\/h4>\r\n
\r\n
\u30fbDSD\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u95a2\u3059\u308b\u8cc7\u6599<\/b><\/p>\r\n
\r\n\u3000”Enabling DSD256 in the USB Audio 2.0 De- vice Reference Design Software<\/a>” \r\n
\r\n
\r\n\u3000“DoP open Standard”<\/a>\r\n
\r\n
\r\n\r\n\u3000\u3000","protected":false},"excerpt":{"rendered":"Linux OS \u306e\u6b20\u70b9\u3092\u53d6\u308a\u9664\u3044\u3066\u3001\u9ad8\u97f3\u8cea\u30aa\u30fc\u30c7\u30a3\u30aa\u518d\u751f\u306b\u7279\u5316\u3057\u305f\u8d85\u8efd\u91cfLinux\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u304c\u4eca\u56de\u7d39\u4ecb\u3059\u308b lightMPD<\/a> \u3068\u547c\u3070\u308c\u3066\u3044\u308b\u3082\u306e\u3060\uff0e","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[713],"tags":[721,717,719,716,649,720],"class_list":["post-4982","post","type-post","status-publish","format-standard","hentry","category-digital-audio","tag-dsd","tag-dsd-native-playback","tag-i2s-dac","tag-lightmpd","tag-raspberry-pi","tag-usb-ddc"],"_links":{"self":[{"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/posts\/4982","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/comments?post=4982"}],"version-history":[{"count":2,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/posts\/4982\/revisions"}],"predecessor-version":[{"id":5012,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/posts\/4982\/revisions\/5012"}],"wp:attachment":[{"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/media?parent=4982"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/categories?post=4982"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/y2tech.net\/blog\/wp-json\/wp\/v2\/tags?post=4982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}