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SIDWAVE
Account closed
Registered: Apr 2002
Posts: 2238 |
How many BPM is a C64 or HardSID ?
[03:19] <rambones> any geniousses ?
[03:19] <rambones> how many bpm is a C64 raster irq ?
[03:20] <rambones> or as i this case. the music is at 51 hz... so i wanna find the sync to the beat
See. i wanna sync a sampled sid to the tracker..
So... it was sampled with HardSID which is 51 hz..
It must be around 120-130... but i am uncertain..
No clue what to google for |
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A Life in Hell
Account closed
Registered: May 2002
Posts: 204 |
This is a function, of course, of the speed in your editor, and a function of how many lines you consider to be a beat :)
So if you multiple editorSpeed x lines-per-beat, you'll get a number out that is frames per beat.
Multiply 51(50) x 60 to convert to frames per minute (3060/3000), then divide by frames per beat. |
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Frantic
Registered: Mar 2003
Posts: 1648 |
If we're talking PAL computer (which we are), then:
187.967033 BPM
125.3113553 BPM
93.98351648 BPM
...for the straight speeds. If you use some kind of shuffle-speed, the numbers differ of course... |
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Jammer
Registered: Nov 2002
Posts: 1335 |
as far as i remember, on amiga protracker - f06 regulated by vbl was around 125 BPM. in single speed steps are called every 6th frame. as beat is counted every 4th step, that gives one beat every 24th frame. 60 seconds * 50 frames / 24 frames gives more or less 125 bpm :) frantic was precise :) |
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Frantic
Registered: Mar 2003
Posts: 1648 |
@Jammer: Well... That 0.31 diff from 125 isn't totally insignificant, I'd say... I mean.. play for one minute and you already start to get slightly off, if synching with some Rambones-PC-stuff. ;)
...or perhaps that smiley was just a sign of you being delighted by my precise expressions. ;) |
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SIDWAVE
Account closed
Registered: Apr 2002
Posts: 2238 |
It almost impossible to sync a sidtune with pc samples, because of the .xxxxx deviation.
Jeroen Tel uses selfwritten special stuff, to make his sidmixes.
And ofcourse he wont give this tool to anyone :)
Even if i timestretch the sidsamples, its still impossible to hit a BPM, that doesnt go out of sync after about 1 min playing..
Cutting the samples in parts, and restarting them at spot on keypoints, makes little gaps. so also this method is fail.. |
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VIC
Account closed
Registered: Aug 2003
Posts: 73 |
Perhaps you should use some shorter samples... Long sequences aren't ideal for remixing - use shorter loops instead... |
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VIC
Account closed
Registered: Aug 2003
Posts: 73 |
On second thought (I'm a little rusty here, so bear with me) you could try to cut up your sid with recycle, but I guess the usefulness of this depends on your sequencer or whatever you use... |
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Stainless Steel
Registered: Mar 2003
Posts: 966 |
What VIC said. try cutting the sid into smaller chunks. works like a charm. You dont have to hit the actual BMP of the sid 100%, since it "resyncs" on every sequence |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
you could use something like melodyne ... :) |
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SIDWAVE
Account closed
Registered: Apr 2002
Posts: 2238 |
Like i explained:
When cutting sid sample to smaller bits, that are beat perfect..
If i have 10 samples, and they are played at
step 1-20-20-30-40 etc. f.ex
Then they sync to themselves, ok!
But the 0.xxxxxxx out of sync frequency, does
that no pc editor (tracker, multitrack editor, whatever),
that it cant sync with it.
It will sound ok to most, but to a musician who is trained to hear total sync, its clear it is buggy.
Ofcourse, if i did multitrack copy pasting of samples, and
spent like many many days on each bit, i can edit out of all problems. but this is too much work really.
Perhaps it is possible to make a sidplayer where you use 1mhz update as override to the 0.xxxxxxx - so that the sample will be synced with any modern editor ??
Like, just patch sidplay 2, to produce output at exactly 1.0 mhz !???
EDIT: i confuse myself...
To make a stable sample, with 0.0 offbeat variance, what is needed, and can it even be done ?
It dont matter that the sid plays not as on c64. it will be so close it dont make a difference, at least for 1x sid..
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