I'm trying to track down a problem I am having with the speech processor
when using the second sound card on V1.3.*. The problem does NOT exist if I
use a single sound card (Santa Cruz) using this code. What happens is when
using the second sound card (AC97 on the motherboard) for Tx as soon as I
select 1dB or more of compression then the low frequency response of my Tx
audio drops by 10dB.
Could you please test as follows.
1. Set up v1.3.3 to use a second sound card
2. Do NOT turn your hardware on.
3. Run v1.3.3
4. Set the mic gain to 0 and the mic preamp to 0dB
5. Turn COMP off
6. Set FeedForward compression to 0dB
7. Set USB
8. Set Display Mode = Spectrum
Press MOX and the display should show your Tx signal as noise in the
passband. This noise should be approximately flat over the passband. Then
turn on the compressor - this should have no effect since it is set at 0dB
of compression. Then set the compression level to 1dB and see if it has any
effect on the noise spectrum. In my case the LF end of the noise drops by ~
10db and I've no idea why!
Please let me know what results you get.
Phil...
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