9600 packet decoding failure

[kawks]

Here is the recording:
http://tortel.net/~lochner/sunsat/19990303_0225_9600_8bis_22kHz.wav

Direwolf (1.2 release, current master and dev branches) decodes no packets:

$ atest -B 9600 19990303_0225_9600_8bis_22kHz.wav 
...
0 packets decoded in 0 seconds.

While multimon decodes them fine:

$ multimon -q -a FSK9600 -t wav 19990303_0225_9600_8bis_22kHz.wav 
FSK9600: fm SUNSAT-14 to ZS1SUN-14 UI^ pid=F0
......E.!...!.!.E...S....
FSK9600: fm SUNSAT-14 to ZS1SUN-14 UI^ pid=F0
......E.!...!.!.E...S....
FSK9600: fm SUNSAT-14 to ZS1SUN-14 UI^ pid=F0
......E.!...!.!.E...S....
FSK9600: fm SUNSAT-14 to ZS1SUN-14 UI^ pid=F0
......E.!...!.!.E...S....
FSK9600: fm SUNSAT-14 to ZS1SUN-14 UI^ pid=F0
...............AQY!.O.N.N

[wb2osz]

Try the latest version on the "dev" branch. Five frames are decoded.

[0] SUNSAT-14>ZS1SUN-14:�<0x03>
[0] SUNSAT-14>ZS1SUN-14:�<0x03>
[0] SUNSAT-14>ZS1SUN-14:�<0x03>
[0] SUNSAT-14>ZS1SUN-14:�<0x03>
[0] SUNSAT-14>ZS1SUN-14:�<0x04><0x01><0x07><0x03>

There is some babbling here discussing minimum audio sample rates vs. data rates for best results: https://github.com/wb2osz/direwolf/raw/dev/doc/Going-beyond-9600-baud.pdf