![]() This example code is in the public domain.= "Generate DTMF tones for the given phone number. */ void setup ( ) See Also:īlinkWithoutDelay - Blink an LED without using the delay() function.īutton - Use a pushbutton to control an LED.ĭebounce - Read a pushbutton, filtering noise.ĭigitalInputPullup - Demonstrates the use of INPUT_PULLUP with pinMode(). StateChangeDetection - Count the number of button pushes. Rpc(description Generate DTMF tones for the given phone number.) public void generateDtmfTones(RpcParameter(name phoneNumber) String phoneNumber. ![]() ToneKeyboard - A three-key musical keyboard using force sensors and a piezo speaker. ToneMelody - Play a melody with a Piezo speaker. TonePitchFollower - Play a pitch on a piezo speaker depending on an analog input.I made an online tone generator based on the Firefox Audio API HTML5 Web Audio API. Input frequency as a number (added Aug 2017).Ĭhoose sine/square/sawtooth/triangle wave (added Aug 2017).Generate a link to a specific tone, so you can share it (added May 2016).Can change the frequency smoothly as you move the slider.Increase/decrease the frequency by one octave (added Aug 2015).Pick a music note from a list (added Sep 2014, revamped May 2016).Fine-tune the frequency in 1 Hz, 0.01 Hz and 0.001 Hz increments.It’s basically a large logarithmic slider that allows real-time, smooth frequency changes.Works well on Chrome, Firefox & Safari – including mobile devices (iOS, Android) – requires a browser with support for the Web Audio API.There are other tone generators on the Web, but they are not as cool (if I do say so myself) and/or they require Java or Flash. What can you use a tone generator for? You can do a science experiment with resonance, tune a musical instrument, test your new audio system (how low does it go?), test the limits of your hearing (I can hear virtually nothing above 18,000 Hz, even at maximum volume), or figure out your tinnitus frequency to better target therapy.ġ. Basically it used to smoothly ramp from one frequency to another - now it’s an immediate change.Ĭhrome recently made some important changes to the Web Audio engine (removing automatic smoothing), which is probably the reason why it sounds “digital” on Chrome 66 and later. I’ve just looked into it and I can do the smoothing myself. I’ll upload the updated version, but first I’ve got to do some testing on more browsers. Anyway, thank you for bringing this to my attention. I don’t use my generator that often, so I would have missed the degradation in sound quality.Ģ. I agree, the new fade-in sounds worse! But the old one (linear fade) resulted in crackling noise on Firefox when changing the volume, or when you quickly alternated between Play and Stop. Firefox has a long-standing bug that makes linear fades impossible to do without popping. I could do a separate fade for non-Firefox, but not sure it’s worth it. I could also make the existing fade shorter, as a compromise. Do you think making it shorter could help? It would mean more audible popping on Firefox, but possibly more pleasing sound on Chrome/Safari. I’m working on a melody (piano and voice) were, at some point, the singer has to sing some quarter-tone intervals (yes, it’s quite experimental…) I’ve found some free quarter-tone pianos on the web, but nothing useful. With your site, I opened different windows, tuned them separatly and could check the tones succession by clicking on the different windows.
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