Questions tagged [tone-generation]

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Irregularities in tone generated using FFT data

I am implementing a simple program to generate tone in MATLAB using FFT/iFFT by zeroing all frequency bins except for the one frequency that I'd like to generate a tone in. Sampling frequency is ...
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1answer
45 views

THD requirement for generated sine

I need to generate a sine signal using a DAC with a certain THD specification, say 0.1% @ 1KHz. As a first approach I’m considering it to be an ideal DAC along with an ideal LPF for aliasing removal ...
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1answer
501 views

PortAudio: how to generate multiple sounds

I have simple wave generator in PortAudio. I'm creating single sine wave, and then I use a lookup sine to play it. Now I've stucked here. I have no idea how I can add another sine sound. Is it ...
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1answer
489 views

How to detect and remove ringback-tone and ivrs voice etc from the beginning of an audio call recording

In an audio recording (say a telephone conv. b/w two people), how would I programatically detect and remove the dial-tone at the beginning of a call using python. Ex : As you can see the first 15 ...
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1answer
767 views

DTMF Tone Generation in MATLAB not sounding right

I'm starting out with some DTMF Tone Generation using Matlab and I wanted to find some theory behind how to generate the various tones for a 4x3 keypad consisting of 0-9, * and #. So far I have the ...
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1answer
165 views

Bandlimited PWM

Trying to figure out how to synthesize a Bandlimited PWM in my audio code in C. I have already figured out a bandlimited pulse wave but I can't really figure out how to translate that to PWM. I have ...
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1answer
286 views

Generating drum sample in programming language [closed]

How would you generate the sample of a drum, say "tom". Using the programming language and it's functions like addition, multiplication, sine, sqrt etc. I tried to generate the sine wave and then ...
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1answer
151 views

reducing MIPS in detecting tones

Currently our software is detecting tones using FFT and checking if there is only a single peak in frequency spectrum. Our software needs to know what kind of input it is before taking action. So we ...
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1answer
1k views

Smoothed Square Wave

new here and probably pretty unexperienced compared to the rest of you. This should be simple enough but just wanted some clarification. I'm trying to model an analog square wave oscillator with C. ...
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1answer
2k views

How to perform sine generation (in C)?

I am interested in how should a listing for a program look like that will generate a sine of f=50hz, using the next arguments for any moment in time. ...
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2answers
7k views

How sine wave is generated using lookup tables

From this document I am quoting P2,L7 So what is the incremental distance if we are using a 64 element look-up table instead of a sine function based on 2π? incremental distance = 2k*64/48k = 8/3. ...
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2answers
246 views

Generating a high SNR sinusoide with lut on a DSP

I'm generating a sinus by using a lut method on a DSPic33f. My sample rate is 48 kHz, so I saved 12000 of the first value (unsigned int, 16 bits) and use trigonometric formulas to calculate the other ...
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1answer
1k views

Tone generation in Matlab (scientific paper)

I'm trying to generate sounds as described in a scientific paper that I found on the Internet. What I need to do is to generate simple tones in a certain pattern, however I have some issues ...
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3answers
5k views

Matlab HIgh frequency sine wave generation

I need to generated a high frequency sinusoidal signal for modulation in MATLAB. But it turns out to be something weird. This is the simple code snippet I used... ...
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3answers
628 views

Constructing a tone through additive synthesis

This question follows from: Synthesizing harmonic tones with Karplus Strong I am attempting to generate a full soundbank of 88 notes. As far as I can see my three options are: Using samples Using ...
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3answers
678 views

Synthesizing harmonic tones with Karplus Strong

I'm building my own MIDI synth. I have to create a decent sounding tone for every note on the piano keyboard (A-1 through C7, or MIDI 21 through 21+88=109) I've been using a basic ring resonator, ...