8-channel TDM receiver
Next to the TDM transmitter this VHDL-logic will receive 8 audio-channels and output them as 24-bit vectors:
8-channel TDM Transmitter
This is an implementation of an 8-channel TDM-transmitter that accepts 24-bit audio, but transmits it within a 32-bit TDM-stream:
SPI Transmitter
An FPGA is a very universal device – if you need a specific digital serial interface, you simply build it on your own. Here is a SPI-interface, that transmits 16 bits, 8 bit for the address, another 8 bit for the data. It is very useful to configure devices like a SPI-ADC, DAC or other…
UltraNet Transmitter
This is the VHDL-logic to transmit 8 individual channels via a single digital transmission line. UltraNet uses an AES3-like connection that contains some Behringer specific channel-status-data. For longer transmission-lines a differential transceiver should be used. Important side-note: even the VHDL-block will take 24-bit audio, UltraNet uses the least-significant two bits to transmit an information for…
I2S Receiver
Dealing with digital audio is a nice thing. Here is my implementation of a 2- and 8-channel I2S-Receiver: If you want to deal with multiple I2S ADCs that are connected to the same bit-clock and frame-sync, we can receive multiple channels at once:
16-channel LED PDM-Controller
While reverse engineering the Behringer P16-I I’ve found a nice thing: this devices has 32 individual LEDs at the front to display the audio-level and the clipping of a channel. But from the internal FPGA only three lines are connected to the front-leds. So I hooked up an oscilloscope and found out, that the signal…