Hi,
I made an adapter board for using a T_4.1 as a replacement for the T_3.6 on my TMA boards. This adapter maps the used pins to new destinations - especially the I2S pins.
Everything works (encoders, I2C display, MIDI-I/O) but the audio seems to have problems. I am getting much strange noise when starting up. When recording via USB-Audio everything sounds fine, only on audio out there is strange noise (with played notes in the background).
Pin assignment is double checked and with the T_3.6 everything works fine.
I am using a Rev B board. So my predefined answers are:
[ ] Your I2S signals may be garbled by your PCB routing and the adapter.
[ ] You really need to add a 100 Ohm resistor into the MCLK line for a Rev A or B audio board.
[ ] You idea, throw everything away and do something you know about.
TIA, Holger
I made an adapter board for using a T_4.1 as a replacement for the T_3.6 on my TMA boards. This adapter maps the used pins to new destinations - especially the I2S pins.
Everything works (encoders, I2C display, MIDI-I/O) but the audio seems to have problems. I am getting much strange noise when starting up. When recording via USB-Audio everything sounds fine, only on audio out there is strange noise (with played notes in the background).
Pin assignment is double checked and with the T_3.6 everything works fine.
I am using a Rev B board. So my predefined answers are:
[ ] Your I2S signals may be garbled by your PCB routing and the adapter.
[ ] You really need to add a 100 Ohm resistor into the MCLK line for a Rev A or B audio board.
[ ] You idea, throw everything away and do something you know about.
TIA, Holger