[Part 2] ALSA Speech Compression and FT-857D

This is just an update from my older post. I have built an isolation box to use between the computer and the FT-857D which at the moment only consists of two 3K 1:1 audio transformers and 500K trimpot to not over load the radios audio input on the data port. I have still got to add the optocoupler into the box so can get the computer to control the PTT via the data port too.

At the moment there has been no noticeable different in the audio quality with the isolation transformers inline, and the compressed audio still sounds good :-)

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