> I wonder if temperatures can be read simply by reading electrical noise Yes and no. On one hand, semiconductor properties are temperature dependent, therefor

> I wonder if temperatures can be read simply by reading electrical noise Yes and no. On one hand, semiconductor properties are temperature dependent, therefore the "noise" from amplifier is temperature dependent. On the other hand, temperatures of the sound card circuitry depend mostly on computer case temperature, not ambient temperature, but that is somewhat combatable with external cards. Furthermore, amplifiers have multiple stages with various feedbacks and filters designed to among other things reduce (i.e. distort) noise, which is bound to reduce effectiveness. Even if one succeeded in training an ML model on sound card noise data, noise profile will most likely be too different on different sound card designs for the model to work. All in all, I suspect that there is enough data in the noise to measure temperatures with one or so degree accuracy, but such a solution would not scale to different hardware.