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Frequency-shift keying - Wikipedia
https://en.wikipedia.org/wiki/Frequency-shift_keying#:~:text=Audio%20frequency-shift%20keying%20%28AFSK%29%20is%20a%20modulation%20technique,signal%20suitable%20for%20transmission%20via%20radio%20or%20telephone.
Frequency Shifter - SoundBridge
https://soundbridge.io/frequency-shifter/
Frequency Shifter is a device which raises or lowers the frequency of an input signal. It does this using a complex amplitude modulation like technique. Unlike the pitch shifter, the frequency shifter does not preserve the harmonic relationships between the various tones and harmonics in the input signal. Because of this, sounds processed by a frequency shifter …
Lab6 Part A- Audio Frequency Shift Keying (AFSK)
https://inst.eecs.berkeley.edu/~ee123/sp15/lab/lab6/Lab6-Part-A-Audio-Frequency-Shift-Keying.html
Write a function sig = afsk1200 (bits) the function will take a bitarray of bits and will output an AFSK1200 modulated signal of them, sampled at 44100Hz. Note that Mark frequency is 1200Hz and Space Frequency is 2200Hz. If your USB device …
Audio frequency-shift keying | Article about Audio ...
https://encyclopedia2.thefreedictionary.com/Audio+frequency-shift+keying
A form of frequency modulation used especially in telegraph, data, and facsimile transmission, in which the modulating wave shifts the output frequency between predetermined values corresponding to the frequencies of correlated sources. Abbreviated FSK. Also known as frequency-shift modulation; frequency-shift transmission.
The 6 Best Frequency Shifter VST Plugins Of 2022
https://integraudio.com/6-best-frequency-shifter-vst-plugins/
Lab5_Part_2-Audio_Frequency_Shift_Keying(AFSK)
https://inst.eecs.berkeley.edu/~ee123/sp17/lab/lab5/Lab5_Part_2-Audio_Frequency_Shift_Keying(AFSK).html
Write a function sig = afsk1200 (bits,fs) the function will take a bitarray (bitarray is a python module for storing array of bits) of bits, and a sampling rate. It will output an AFSK1200 modulated signal of them, sampled at fs [Hz]. Make sure the frequencies match the bits in the way described by the table above.
sound - How to shift frequency of whole audio file ...
https://sound.stackexchange.com/questions/34921/how-to-shift-frequency-of-whole-audio-file
The thing is, frequency shifting is a pretty weird operation. For audio purposes, it is quite reminiscent of the typical ring-modulation character (which isn't entirely surprising, since it is implemented with multipliers). At any rate, if you frequency-shift, say, human voice, up a few Hz, it'll sound nothing like the same voice speaking/singing a tone higher, because the harmonics …
comp.dsp | Shift frequency of an audio signal
https://www.dsprelated.com/showthread/comp.dsp/9996-1.php
You are implementing the trigonometric relationship: sin(w1+w2)t = sin(w1)t * cos(w2)t + cos(w1)t * sin(w2)t Here, sin(w1)t is your audio signal and w2 is the frequency shift you want to implement.
Laboratory Frequency Shifter | Cherry Audio Store
https://store.cherryaudio.com/modules/laboratory-frequency-shifter
Description. The Laboratory Frequency Shifter is a fun and useful module providing weird and wonderful effects. Not to be confused with a pitch shifter which preserves harmonic ratios, a frequency shifter shifts all frequency components by the same amount (which destroys the harmonic relationships). For example, a 200Hz sawtooth wave has frequency components …
Chapter 13. Frequency and Pitch Shifting
https://www.cim.mcgill.ca/~clark/nordmodularbook/nm_spectrum_shift.html
In this case the increase in frequency effectively comes from a double "counting" (or double reading-out) of the audio samples in the delay line. This sudden shift back to the end of the delay line will usually result in a big discontinuity in the signal being read out of the delay line (as the value of the signal at the end of the delay line will usually not be the same as that at the …
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