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Operating Systems OS X (Apple) Text mode AF spectrum analyser. Post 302996456 by wisecracker on Wednesday 26th of April 2017 12:27:40 PM
Old 04-26-2017
Quote:
Originally Posted by Corona688
I do think Python, Perl, etc is about as good as you can expect for FFT unless we can convince a genuine, credentialed Computer Scientist to build one for us. Smilie It's possible to do it - I've seen it done in Basic - but the mathematics are very subtle and involve complex numbers or ways to cheat around non-complex numbers.
Boy don't I know it now.
It took a couple of days to get my head around how to set about jumping from the python result into a bash array but in the end I decided on saving to disk then using cat to get that result into the bash array. So I took the easy way out.

As for you previous post I don't need the for loop at all as it will get the WAV file from the FREQ command in AudioScope to look at its spectrum. There it little point in looking at the main capture as a few users might just use the internal mic only.
However I will use your method of generating the window although I have already modified it for my requirements.

The image is the new look and colours of the spectrum of a single sung note into the mic from FREQ command in AudioScope...
Text mode AF spectrum analyser.-single_sung_notejpeg
 

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UHD_SIGGEN_GUI(1)						   User Commands						 UHD_SIGGEN_GUI(1)

NAME
uhd_siggen_gui - GNU Radio signal generator using UHD hardware SYNOPSIS
uhd_siggen_gui: [options] DESCRIPTION
GUI to allow UHD supported hardware to be a signal generator. OPTIONS
-h, --help show this help message and exit -a ARGS, --args=ARGS UHD device address args , [default=] --spec=SPEC Subdevice of UHD device where appropriate -A ANTENNA, --antenna=ANTENNA select Rx Antenna where appropriate -s SAMP_RATE, --samp-rate=SAMP_RATE set sample rate (bandwidth) [default=1000000.0] -g GAIN, --gain=GAIN set gain in dB (default is midpoint) -f FREQ, --tx-freq=FREQ Set carrier frequency to FREQ [default=mid-point] -x WAVEFORM_FREQ, --waveform-freq=WAVEFORM_FREQ Set baseband waveform frequency to FREQ [default=0] -y WAVEFORM2_FREQ, --waveform2-freq=WAVEFORM2_FREQ Set 2nd waveform frequency to FREQ [default=none] --sine Generate a carrier modulated by a complex sine wave --const Generate a constant carrier --offset=OFFSET Set waveform phase offset to OFFSET [default=0] --gaussian Generate Gaussian random output --uniform Generate Uniform random output --2tone Generate Two Tone signal for IMD testing --sweep Generate a swept sine wave --amplitude=AMPL Set output amplitude to AMPL (0.0-1.0) [default=0.15] -v, --verbose Use verbose console output [default=False] SEE ALSO
uhd_siggen(1) uhd_siggen_gui 3.5 December 2011 UHD_SIGGEN_GUI(1)
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