Hi dear all OM,
I have found that JT9 binary tools installed with wsjtx can decode FT8
in command line with --FT8 option.
Also i try to use wsprd to do the same.
Unfortunatly i actualy dont find the right way to record wav for this.
I use a redpitaya with gnuradio to send 384khz in some loopback (use for
websdr and decode software).
I have compiling my linux kernels for increase loopback to 384khz, see:
http://www.f4htb.fr/2018/11/09/augmenter-le-sample-rate-des-aloop-alsa-loopback-dans-ubuntu-18-04-avec-noyaux-low-latency/
Yet i try to use arecord, csdr and sox to get some alsaloopback dsnoop
as source, xtaling, fir filtering and resend it in sox for save as wav
to decode like:
arecord_adv -d 15 -q -t raw -f S16_LE -r384000 -c2 -D dsnoop:lp4,1 -F0
--period-size=1024 -B0 --buffer-size=4096 | csdr convert_s16_f | csdr
shift_addition_cc `python -c "print float(3568600-3573000)/384000"` |
csdr fir_decimate_cc 8 0.05 HAMMING | csdr bandpass_fir_fft_cc 0 0.1
0.05 | csdr realpart_cf | csdr gain_ff 20 | csdr convert_f_s16 | sox -q
-t raw -b 16 -e signed -c 1 -r 48000 - -t wav FT8.wav
but when i try to decode with:
At line 188 of file /home/bill/wsjtx-prefix/src/lib/jt9.f90
Fortran runtime error: Substring out of bounds: lower bound (-1) of
'infile' is less than one
Error termination. Backtrace:
#0 0x7f46d681f31a
#1 0x7f46d681fec5
#2 0x7f46d6820297
#3 0x5654003b0ceb
#4 0x5654003ae99e
#5 0x7f46d58c6b96
#6 0x5654003aea99
#7 0xffffffffffffffff
But when i try with other sample in wsjtx sample, it work great:
jt9 --ft8 181201_180245.wav
180245 0 0.1 232 ~ K8RGI W6BQ 73
180245 -21 0.2 325 ~ CQ RU K1BAA DM03
180245 -4 0.0 446 ~ CQ RU W7BOB DN14
180245 16 0.1 600 ~ KV4ZY NX8G 539 OH
180245 13 0.2 652 ~ KV7J WD9HSY 529 IL
180245 3 0.5 786 ~ N8HRZ W7CD 73
180245 -16 0.1 841 ~ W7PP AF4T 539 TN
180245 -2 0.1 1000 ~ XE1MEX N0UX 559 CO
180245 4 0.6 1151 ~ KC8YDS KF6CRW R 559 ID
180245 -19 0.1 1442 ~ K1JT 9A2JK RR73
180245 -15 0.3 1719 ~ W3RGA KJ7G 529 WA
180245 -9 0.1 1799 ~ N9CIF KE0PX DM67
180245 12 0.1 1879 ~ W3RGA KM6JD RR73
180245 -5 0.1 1980 ~ CQ RU NT2A FN20
180245 9 0.2 2189 ~ N9LF WV4P R 529 TN
180245 4 0.2 2454 ~ WB3LGC AA5AU R 529 LA
<DecodeFinished> 0 16
have you somme idea?
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