Stage pianos Electric pianos Ĭlavinova CVP-303 (finishes: default = dark rosewood, C = cherry, M = mahogany, PE = polished ebony, PM = polished mahogany) TransAcoustic (Silent with a transducer added to essentially make the piano one big speaker)įound in uprights: U1, U3, YUS1, YUS3, YUS5 and Grands GC1 and C1X according to Hybrid pianos Hybrid grand pianos SH series silent modules found in more up market models such as Uprights P116, P121, U1, U3, YUS1, YUS3, YUS5, SE122, SE132, SU7 and Grand S3X, S5X, S6X, S7X, C1X, C2X, C3X, C3X Chrome, C5X, C6X, GC1 and GC2. SC series found in Upright B1,B2,B3 and Grand GB1K - "entry level" models. You may be interested in an answer I posted recently showing how to set the PulseAudio Equalizer from the command-line.Silent piano system silencer & optical sensor, with PCM sound & MIDI recorder unit I kind of wish that audio stuff on Linux had better documentation and error reporting. This is why I have -no-remix -no-remap in paplay above I just want the raw channel ordering for the sox command. I originally created an ALSA device wrapping the PulseAudio device, but then I found that it is impossible to control the channel mapping using ALSA, and so random channels were getting mixed together according to how my custom channel-map differed from the ALSA default. In this example we have a six-channel device and we're sending a tone to the third channel. It is much more powerful but we only use the basic functionality here. The remix effect is just used to send the result to a specific channel. sox-paplay synth sine 1000 gain -5 remix -m 0 0 1 0 0 0 Sox -c $NCHAN -n -t raw -r $HZ -L -b 16 - | paplay -no-remix -no-remap -raw -v -p -rate $HZ -d $SINK -channels $NCHANĮ.g. The pipeline is tedious so I created a script: $ cat sox-paplay I had trouble interfacing SoX with PulseAudio so I just pipe sox raw data into paplay. There were some stumbling blocks but I was eventually able to figure it out. You can easily synthesize tones with SoX. Further, as there's no named cosine type, p0.25 is the way to turn sine into cosine (or p0.75 for negative cosine). Adding p0.5 sets phase to 50% of the wave cycle (negative half). sin but not saw), is to set the phase using a lowercase p. Old edit: I'm indeed the developer of the program.Īlso, an alternative way of flipping the amplitude (for some wave types, e.g. Any numbers from "(-1.0)" to "1.0" can also be used for such values. The cs are for changing the channel mixing (L = hard left, R = hard right) from the default (C = center). This is also short enough that it can instead simply be ran as a one-liner directly. To generate two stereo-separated 100 Hz waves, one a sine and one a triangle, and one with inverted amplitude, the following script can be pasted into a file and ran through the program (as in. (It is a command-line audio generator supporting a language including more types of audio generation, including centrally FM/PM and AM/RM modulation techniques.) Minimal C audio generation example without extra libraries aevalsrc takes arbitrary mathematical expressions, and should therefore be able to produce triangular waveforms (TODO expression).anoisesrc: noises of several colors, e.g. The other section sunder Audio sources document other useful sound generation algorithms in addition to sine, e.g.: Play forever until you go mad: ffplay -f lavfi -i "sine=frequency=1000" -nodisp Play the audio for 5 seconds without creating a file: ffplay -f lavfi -i "sine=frequency=1000:duration=5" -autoexit -nodisp The file will be 2x as large, and ffprobe will say it has 2 channels instead of 1 channel. Stereo instead with -ac 2: ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" -ac 2 out.wav Create a 5 seconds mono 1000Hz sinusoidal out.wav sound file: sudo apt-get install ffmpegįfmpeg -f lavfi -i "sine=frequency=1000:duration=5" out.wav
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