With the 8K sampling, how many bits per sample were used per sample? 

The reason I ask is because the 1970s T1 systems did sample at 8000 sps and transmitted 8 bits per sample, but those 8 bits represented a compressed (compandered) value.  Although I've forgotten the specifics, the entry on Wikipedia for uLaw coding seems to indicate that the compander transformed the data from 14 bits uncompressed to 8 bits compressed, and vice versa at the RX end.

Paul, ad7i


On Thu, Sep 23, 2021 at 8:54 PM Paul Heller <phearvada@gmail.com> wrote:
It was definitely sampled at 8K. As I said, sampling at 11K and 22K were fine. It only dropped when sampling at 8K.

The streaming software does not know about sample rates - it just sends it out.

It’s a puzzle

Paul

> On Sep 23, 2021, at 6:04 PM, Harold Hallikainen <harold@w6iwi.org> wrote:
>
> I don't know what the combination of hardware and software is, but is it
> possible that the audio was being sampled at a higher rate than 8k, then
> being streamed at 8k? This would explain the frequency drop and bit rate
> drop. But, it seems like the transmit buffer would eventually overflow.
>
> Harold
>
>
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