20170518

Apparently pifm which I tested last year only works in RasPi2 and I’m now trying to get RpiTx to stream FM trough USB audio in (I bet that for what I need it would be easier to buy a RasPi2). RpiTx is very advanced but I can only get it to broadcast audio files over fm (here is a simple tutorial). Unfortunately I can’t get it to stream live audio trough my USB audio interface. Following rpitx-app-note‘s I learned about:

arecord -c1 -r48000 -D plughw:CARD=Device,DEV=0 -fS16_LE - | csdr convert_i16_f | csdr dsb_fc | csdr bandpass_fir_fft_cc 0 0.1 0.01 | csdr gain_ff 2.0 | csdr shift_addition_cc 0.2 | sudo rpitx -i- -m IQFLOAT -f 100000

But it is dependent on libcsdr, which I can’t get to compile on RasPi3 because “If you compile on ARM, please edit the Makefile and tailor PARAMS_NEON for your CPU.” and I have no idea on the RasPi3 PARAMS. I found some hints on what to do (but it seems that those are set for RasPi2). Trying to sort the things out by installing gnuradio and other tools as recommended in a different tutorial.

I’ll make yet another clean install of Raspbian and continue in the evening with PiFmRds. I’m using Etcher to write the os on the sd card, which seems to work well. I should learn how to clone the sd card.

Visited Lovi ambient event at Lava klubi and saw a good gig by Rasmus Hedlund and Paula Lehtonen. Their collaboration yelds great results. Paula designed video using material from their trip to Tasmania and Rasmus crafted a field of sounds consisting of oceanic & low jungle rumble tones. Spotted a Make Noise Photogene in use. The gig was constructed out of some 8-10 distinct soundscapes, which were supported by videos from different locations.

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