Randy -
I don't have a specific recommendation, but I deal with audio compression
professionally, so here are some guidelines.
The frequency response of the recorded signal will be equal to slightly less
than half of the sample rate. For example, a compression technique that
advertises a sample rate of 12KHz would provide an audio frequency response
out 5 to 6 KHz. This is probably fine for ham radio with its 3KHz
bandwidths.
The other factor is how many bits are used to record each sample. CD's use
16-bits, so that would represent extremely high quality. You might try a
compression ratio with 8-bits and adjust the number to suit your desire for
quality.
Of course, the hard disk space required will be equal to the sample rate
times the bit-depth at which you wish to record.
I'm just setting up WriteLog for the first time, so have not come to a
conclusion myself as to what level of compression I want to use. On a
related note, I am connecting an FT-1000MP and PC to my W5XD/K5DJ
Multi-Keyer. Ron said you had such a setup and you might be able to
recommend cabling details. Trying to decipher the incomplete keyer schematic
leads to questions. For example, are the jumpers shown between pins 4/6 and
7/8 on the RIG connections something you put on the connector that plugs into
this port, or are they internal jumpers in the MK-1100? Same question for
the "jumper" shown on pins 1/6 for the PC connector. Regarding the
handshaking lines (DTR, RTS, DSR, CTS), I can figure this out, but is there
any kind of "typical cable detail" for the cable between the MK-1100 PC
connector and a typical 9-pin computer serial port?
Thanks, in advance, for any info you can provide and good luck with finding
an audio compression algorithm that meets your needs.
73, Bob - W3YY
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