No need to clear it until you want to enter different code.
When you want to enter different code, just select all the code in the Nyquist Prompt’s text box and delete, then type or paste the new code.
Thanks, steve, I must learn Nyquist.
“So in Audacity “Chirp”, I guess you could say I would generate a sweep of tones between 130 Hz and 260 Hz and then repeat that however many times to make a loop?” … Depending on the length of the sweep … may sound more like a police siren…??
The type of tones posted earlier were very short chirps with silence gaps in between and then repeated to give a harsh sound and then modulated.
To do similar from menu, create the chirp, add silence, repeat it for whatever duration, then apply Effects, WahWah may be the simplist modulation.
Probably the most simple would be use Menu Generate tone say 200 Hz then generate a second tone 201 Hz, then mix and render to new track… you will get waveform of the sum/difference in the 2 frequencies a sort of wahwah effect depending on wave… You can experiment with mixing sine, square, triangle, sawtooth to get different effects. Keep the amplitude of each generated tone down to 0.3 or 0.4 so you dont get clipping when they are mixed.
Is there a way to create a version where there’s not an extra snippet at the end which would be the beginning of the next round of the tone? What would I put in the Nyquist code if I was editing it in Notepad?
I dont know the Nyquist solution but if you are talking about generating from The Menu…Generate…Tones etc by generating two tones 1 Hertz apart, then because the 2 tones start in phase they will start the mix at max amplitude… giving half a second from Max to Min at start and also at end… so say for 6 secs wahwah tone that would be 12 half seconds in length…so instead generate 7 seconds, then trim off the 1st half second and the last half second to leave 6 seconds…starting at minimun and ending at minimum amplitude, then add the silence gap you want at the end… and repeat all of this for the duration you want.
This also works with adding harmonics…say 100, 200, and 300, , mixed with 101, 201, 301…
OR with adding harmonics…say 100, 200, and 300, , mixed with 101, 202, 303…etc etc
Is this sort of what you mean?
That is just a chirp from about 250 Hz to about 150 Hz for 1 Second, using a sawtooth, modulated with something that gives “ringing” on the sudden transitions of the sawtooth. Is this the type of tone you are trying to generate…???. You could copy this tone in a track 10 times and it would give a repeating wahwah type tone for 10 seconds.
Your first post gave example of “wahwah” type tone… Is this the type of tone you are trying to generate…??
OR are you trying to re-imagine the actual tones of old telephone systems… ??..Different systems and different countries had different tones. If I google old telephone system tone I get lots of sounds these could be coipid into Audacity and repeated as long as you like. that would give you the “real” tones as google has them " whether they are correct or not…"
I guess you could say I’m trying to recreate the tone. However, that’s not as easy as, say, recreating a dial tone, busy tone, off hook tone, or even a ringback tone.
Do the tones have to be the correct tones as was generated maybe 125 years ago or are they just “look a likes” or “sounds like”. Did you read “Trebor” post above, there are good recordings there, but they may not be the correct ones depending on country or system etc.
Most of them are simple sinewave of a short burst followed by silence others anre more complicated mixes of several frequencies etc
I’m trying to create sound alikes so I can feature them in an app I’m in the process of making.
So is the app is about the process of generating the tones from fundamental frequencies and basic sinewaves, squarewaves etc. Not just being able to play the sounds from a recording as in maybe a history type app… and your app would say…this is what it sounds like.
Creating from basics will mean trying to create a very precise wave without knowing its specification or what frequencies it contains. To some extent like DTMF tones on a phone, these are generated from specific tones for each row of numbers and each column of numbers on a keypad and a mix of both tones is generated depending on the key pressed. But it is easy enough to get the DTMF frequencies and mix them as required.
No it’s actually like a “virtual phone”. It’s made for fun. Kind of like this one. Rotary Telephone Emulator. I’m making a desktop app that people can install on their machines to make mockups of phone calls. If you know what I mean.
I imagine you will have to programe the app in the language of the app and it seems the simplist would be to play recordings of the tones corresponding to the number dialled and the response is it dial tone, ringing tone or busy tone etc. I dont see how you would want Audacity to generate tones as each number is dialled…??..It would mean running the app and audacity at same time…??
The audio recordings I make will be assigned to keys in this app. I will use Audacity to create the recordings, then include those recordings as part of my app.
This is the bit that seems confusing… How will you know what tones you want or will need for a particular dialled number or a dialling tone or busy tone without first of all listening to a recording of it or listening to the real thing…You could them make you own recording of it and have it rather than trying to generate something in Audacity that is similar…??.. It will only be similar except you have the original technical specification…
I would look up the frequencies of each tone on a web site that has references to international tone signaling. For example, the World Tone Database at www.3amsystems.com.
If you can look up a database and get the basic sinewaves used then just generate them in Menu, generate tone, mono … If more than one tone used just generate them one after the other in separate tracks…then select all and mix and render to new track. Then delete the basic sinewaves and keep the mixed one… then Cut and insert silence as required and repeats as required. But if the database already has a recording why not just record it.
Just wondering… did you find the specification for “No Such Number” tone, I looked up the database but don’t see any listed…???
It seems the only tones for the United States I found are these ones. They’re just a single frequency tone whose name is actually “Number Unobtainable”. I couldn’t find the so-called “Cry Baby” tone. United States, Number unobtainable tone | World Tone Database | Ringtones (3amsystems.com)
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