Play Teensy 4.1 Audio through 6.35mm Output
- Thread starter cheeft
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PaulStoffregen
Well-known member
It really depends, as not all 1/4 inch audio inputs are created equal.
Some are balanced audio, others are ordinary single ended. Some expect a pretty high level signal, others like inputs meant for guitar pickups or expect a small signal with high impedance. Still others meant for microphones expect an extremely small signal, but usually with low impedance.
The audio board is the path of least resistance if you're not really familiar with the software, since almost all the examples are written to "just work" with it. But you do have alternatives. The PT8211 chip sounds almost as good, but costs much less (and is output only, no signal input to Teensy). Or if you really want to go the minimal route, you could give MQS a try. Like all digital pulses filtered to become audio, it's sensitive to any audio band noise on your 3.3V power supply, so if you plan to use LEDs or other power hungry stuff, be aware of the potential issues. But in many applications MQS can give really good sound.
How to convert those MQS pulses, or the PT8211 output to the signals your audio input needs really does depend on what type of audio input it is. So many wildly different audio inputs all use those 1/4 inch plugs that you really need to be more specific for anyone to give a useful answer. But hopefully this at least helps move the conversation forward...
Some are balanced audio, others are ordinary single ended. Some expect a pretty high level signal, others like inputs meant for guitar pickups or expect a small signal with high impedance. Still others meant for microphones expect an extremely small signal, but usually with low impedance.
The audio board is the path of least resistance if you're not really familiar with the software, since almost all the examples are written to "just work" with it. But you do have alternatives. The PT8211 chip sounds almost as good, but costs much less (and is output only, no signal input to Teensy). Or if you really want to go the minimal route, you could give MQS a try. Like all digital pulses filtered to become audio, it's sensitive to any audio band noise on your 3.3V power supply, so if you plan to use LEDs or other power hungry stuff, be aware of the potential issues. But in many applications MQS can give really good sound.
How to convert those MQS pulses, or the PT8211 output to the signals your audio input needs really does depend on what type of audio input it is. So many wildly different audio inputs all use those 1/4 inch plugs that you really need to be more specific for anyone to give a useful answer. But hopefully this at least helps move the conversation forward...