Sickle666 quoth Ok, so why then do some clearly perform better than others?
Sampling rate of the ADC the pot is connected to, probably...
MIDI Controller testing
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- Beware the Quoth
- 35505 posts since 4 Sep, 2001 from R'lyeh Oceanic Amusement Park and Funfair
An idiot on Set Theory:
"In some cases there is an object called red that contains everything that is red. In much the same way a pot is a plate."
"In some cases there is an object called red that contains everything that is red. In much the same way a pot is a plate."
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- KVRAF
- Topic Starter
- 1884 posts since 9 Feb, 2004 from Rochester, MN
The weird thing about my Radium is that the sampling rate isn't consistent (well, data entry and mod wheel excepted). On average, it's roughly 10 samples/sec, but occasionally (meaning about once every second) there are two samples only 20ms from each other.
Movies running at 30fps isn't exactly a great analogy because the inherently recorded motion blur. Current games are a better comparison, and 30 is pretty much the minimum required for smooth gameplay.
Anyway, if this is only a problem with Radiums, then there's no problem. But I'm interested in an Ozonic, so I'd love to see for myself that it is smooth enough.
Movies running at 30fps isn't exactly a great analogy because the inherently recorded motion blur. Current games are a better comparison, and 30 is pretty much the minimum required for smooth gameplay.
Anyway, if this is only a problem with Radiums, then there's no problem. But I'm interested in an Ozonic, so I'd love to see for myself that it is smooth enough.
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- KVRist
- 99 posts since 15 Feb, 2004
It has to do with things like the sampling rate and the A to D convertor. A higher sampling rate will give smoother changes, and over-sampling at 12 or 16 bits and converting to 8 bits for MIDI would result in better 'resolution', too.
{Edit} Geez - I go out for an hour and someone beats me to the answer...
{Edit} Geez - I go out for an hour and someone beats me to the answer...
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- Banned
- 4026 posts since 27 Jan, 2004
I always thought that the industrial grade was more advanced than military...who develops the military grade stuff? Isn't it the industry?Sickle666 wrote: You have three basic grades of electronics; commercial, industrial, and military..
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- Banned
- 6127 posts since 1 Apr, 2004 from Et in Arcadia Ego
Dunno, but that's the order of quality as I always understood it.
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- KVRAF
- 5851 posts since 9 Jul, 2002 from Helsinki
Warmonger, ftp is not working with Firefox or even SmartFTP, says it can't find the file MIDItest.trkarch.
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- KVRist
- 362 posts since 11 Sep, 2002 from Scotland
I may be misreading bradkvr's post, but I'm not so sure that all pots are made equal... I may be wrong about this, but when I took a cheap joystick apart to make my pedal board, I replaced the joystick's pots with some new ones I'd bought from maplin. It came as a bit of a shock to find that the new pots had significantly less resolution (this probably isn't the right term - I mean less resolution from the software side of things - the o/p value jumps in big steps) than the original joystick ones. This is with the same circuitry, so the same sampling rate is being used.
What I reckon made the difference is that the new pots were lower quality, and therefore they weren't lubricated(?) as well (they're certainly more stiff to turn than the original ones), with the result being that when you turn them, the resistance only changes in big steps.
Of course, I've no idea if this applies to midi controllers... I'd have thought that they'd use components of at least the same quality as those in a £15 joystick...
- Niall.
What I reckon made the difference is that the new pots were lower quality, and therefore they weren't lubricated(?) as well (they're certainly more stiff to turn than the original ones), with the result being that when you turn them, the resistance only changes in big steps.
Of course, I've no idea if this applies to midi controllers... I'd have thought that they'd use components of at least the same quality as those in a £15 joystick...
- Niall.