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发表于 2015-2-28 00:45:40
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https://hifiduino.wordpress.com/ ... g-soekris-r-2r-dac/
http://www.dimdim.gr/diyaudio/so ... magnitude-r-2r-dac/
INITIAL FEATURES
The initial release (“v1) of the firmware together enables the following features:
I2S input up to 384KHz sample rate (tested to 192KHz)
SPDIF input up to 192KHz (tested to 96KHz)
Automatic De-emphasis for 44.1KHz material
Built-in set of simple FIR filters for all sample rates
Digital volume control through simple potentiometer
Automatic input selection
Data reclocking: s/w PLL with 0.02 Hz low pass filter
S/W interface (serial interface) allows:
Volume control (e.g. with Arduino)
Input selection (e.g. with Arduino)
Loadable FIR filters including bypass filter for NOS support (s/w utility included)
Firmware update/upgrade
Upcoming features (through user-performed firmware upgrade)
DSD support
Filter cascading for digital crossover
Filter cascading for balanced use
Master clock output
Planned for “v2″ firmware [link], [link]
4 FIR1 filters for each sample rate selectable through the serial port with a default selection (#2)
Linear Phase
Medium, optimized mix between Linear Phase and Minimum Phase
Soft, mostly Minimum Phase but not that good alias rejection
No filter, also called non oversampling, no alias rejection
Improved response for FIR2 filter which will be modified to be pretty soft….
Enabled serial port on the isolated side (3.3v) |
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楼主
每个人喜欢的声音不一样，没对比过基本觉得够好了，这很正常，没什么可笑的。
你打算接OP111OP的DP么。
