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StackExchange
StackExchange
21:09
1
Q: Make some noise-cancelling headphones

wizzwizz4I am in desperate need of some ear defenders, so I can program in peace. Unfortunately, I don't have ear defenders. But I do have a pair of headphones, a microphone and a microcontroller, so I thought I'd make some noise-cancelling headphones. However, there is one tiny problem. I can't program ...

code-golf audio
DenkerAffe
DenkerAffe
Why require STDIN/STDOUT? I don't see a reason why we shouldn't be allowed to use function arguments/returns values instead.
wizzwizz4
wizzwizz4
Although, there is a good reason you shouldn't be allowed to; it would be a bit of a rubbish noise-canceller if there wasn't any cancelling until all the bytes had been received through the microphone!
@xnor It has to not be given in Hex. I just didn't think it would be easy to read NULL and DEL characters. You need to output as a byte stream. (I'll update the question.)
@xnor An arbitrary-sized number or a string of bytes is an acceptable replacement for a byte-stream.
@CatsAreFluffy Of course; this wouldn't be code-golf if you were just golfing my code!
DenkerAffe
DenkerAffe
For a complement of 255 and a modifier of 2 I get 191 and not 255 again like in your example. I am calculating it with floor( (255-128)/2 + 128) Am I doing something wrong?
wizzwizz4
wizzwizz4
@DenkerAffe No, all of my examples are broken. I need to fix them.
DenkerAffe
DenkerAffe
Are you sure about the output for 224 and modifier 128? I get ceil(127 - ((127 - 31)/128)) = 127 and not 121
wizzwizz4
wizzwizz4
21:09
@DenkerAffe Fixed them now!
DenkerAffe
DenkerAffe
You sure about the modifier 0.5? This gives me values over 300. (255-128)*2+128=382
wizzwizz4
wizzwizz4
@DenkerAffe What would be the correct wording for "values more than 0xff should be 0xff, and values less than 0x00 should be 0x00?
DenkerAffe
DenkerAffe
@wizzwizz4 max(min(d,255),0) should do the job if you want to be concise. Your text desciption works as well tho.
wizzwizz4
wizzwizz4
I'm not sure why this moved to chat...
DenkerAffe
DenkerAffe
SE does this automatically if comments turn into a long conversation.
wizzwizz4
wizzwizz4
21:14
Ok. Well, do you think there's a better wording for that?
Ooh: "clipped".
DenkerAffe
DenkerAffe
I think what you had in mind is fine
Just make sure to sandbxo your post next time, this had too be revised way too much.
 
2 hours later…
ninjalj
ninjalj
23:24
"clamping" en.wikipedia.org/wiki/Saturation_arithmetic

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