zhangyuqing
/
ESP8266Audio
mirror of https://github.com/earlephilhower/ESP8266Audio.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Update README 

Include information about the new class in the main README
This commit is contained in:
Hema2 2024-04-04 22:39:46 +02:00 committed by GitHub
parent 91c45a54bf
commit 839810d9a3
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
README.md
View File

@ -142,6 +142,8 @@ AudioOutputI2S: Interface for any I2S 16-bit DAC. Sends stereo or mono signals
AudioOutputI2SNoDAC: Abuses the I2S interface to play music without a DAC. Turns it into a 32x (or higher) oversampling delta-sigma DAC. Use the schematic below to drive a speaker or headphone from the I2STx pin (i.e. Rx). Note that with this interface, depending on the transistor used, you may need to disconnect the Rx pin from the driver to perform serial uploads. Mono-only output, of course.
AudioOutputI2SNoDACS3 (experimental): Same as the one above, but (ONLY) supports the ESP32-S3. It also requires a dummy (unused) pin for the clock output.
AudioOutputSPDIF (experimental): Another way to abuse the I2S peripheral to send out BMC encoded S/PDIF bitstream. To interface with S/PDIF receiver it needs optical or coaxial transceiver, for which some examples can be found at https://www.epanorama.net/documents/audio/spdif.html. It should work even with the simplest form with red LED and current limiting resistor, fed into TOSLINK cable. Minimum sample rate supported by is 32KHz. Due to BMC coding, actual symbol rate on the pin is 4x normal I2S data rate, which drains DMA buffers quickly. See more details inside [AudioOutputSPDIF.cpp](src/AudioOutputSPDIF.cpp#L17)
AudioOutputSerialWAV: Writes a binary WAV format with headers to the Serial port. If you capture the serial output to a file you can play it back on your development system.