USBでハイレゾが使えるDACを自作してみようかな〜〜ということで
ブレッドボードで組み立てられる用にボード化されることで（笑）

!USB I2S出力があるもの // $60位
http://www.diyinhk.com/shop/audio-kits/58-xmos-dsd-dxd-384khz-high-quality-usb-to-i2s-pcb.html

http://www.ratocaudiolab.com/product/kit/rex_k24192dsdu/

!DAC // 2400-yen
http://www.sengoku.co.jp/mod/sgk_cart/detail.php?code=EEHD-4LVH#

http://www.diyinhk.com/shop/audio-kits/31-384khz32bit-pcm5102a-dac-i2s-input-ultra-low-noise-regulator.html

!UNIT
http://www.ratocaudiolab.com/product/kit/rex_k2496u/

!OPA
http://akizukidenshi.com/catalog/g/gI-02405/

http://akizukidenshi.com/catalog/g/gI-02914/

!Wireless
https://www.denshi.club/pc/audio/cpi-wam0014.html

!i2s_DAC
https://ja.aliexpress.com/wholesale?catId=0&initiative_id=SB_20181013040515&SearchText=I2S-DAC

!Raspberry_Pi
https://ja.aliexpress.com/item/Leory-es9023-dac-x900-hifi-dac-hd-3-b-2b-a/32854739243.html?spm=a2g11.search0104.3.76.516f3692CFgmJc&ws_ab_test=searchweb0_0%2Csearchweb201602_1_10065_10068_318_319_10696_450_10084_10083_10618_452_535_534_533_10307_532_5727311_204_5727211_10059_10884_10887_100031_320_10103_448_449%2Csearchweb201603_60%2CppcSwitch_0&algo_pvid=7856330d-1cab-4fd8-b815-e6ab85bfc74e&algo_expid=7856330d-1cab-4fd8-b815-e6ab85bfc74e-11