27 February 2018, 06:33 | #1 |
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Paula's audio range is 9 octaves
Um, isn't that the entire range of human hearing?
I read this in specifications of the Amiga back around 1989-1990 and it always impressed me that a sound chip could be so wide-ranging, considering how limited (less than half the 9 octaves) other sound chips were. Of course, when you consider that Paula uses sound samples and those can be anything in the audio range, and they're played at a very wide range of frequencies, then the range is justified, if not always the quality. But when you consider what an octave actually is (I can only hum around three), surely 9 covers the entire range of human hearing? So in theory, Paula is the best ever sound chip ever devised by man? |
27 February 2018, 07:23 | #2 |
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I don't know if technically speaking Paula is the best chip around
I only use my ears and i LOVE his sound |
27 February 2018, 07:47 | #3 |
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27 February 2018, 08:40 | #4 |
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27 February 2018, 08:48 | #5 |
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27 February 2018, 09:11 | #6 |
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27 February 2018, 10:23 | #7 | |
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Quote:
Also, I said that Paula covered the frequencies, if not always the quality. |
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27 February 2018, 10:33 | #8 | |
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Nope, Paula has lot of limitations and for sure is not "the best ever sound chip ever devised by man" (it lacks 16 bit, limited DMA sample rate, physically combined channels without positioning across Left Right and many more). |
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27 February 2018, 10:53 | #9 |
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I know that. As I said, I was being sarcastic.
I know that Paula is only 8-bit, has four channels that are locked two per side (honestly, why do people think it should position across left and right?) and that there can be this horrible shimmering effect in the sounds if the sample rate is too low, but what I love about Paula over other sound chips is that it does SAMPLES, and that means any possible musical instrument and vocals and anything, really. I wanted to have a serious debate about if the "9 octaves" statement was true, or that it wasn't just made up by Commodore Marketing to make themselves look better than everyone else, but no, everyone locks onto my sarcastic statement. |
27 February 2018, 10:55 | #10 |
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27 February 2018, 10:59 | #11 | ||
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Quote:
Quote:
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27 February 2018, 11:29 | #12 | ||
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Quote:
Straight from the horse's mouth, it seems. Quote:
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27 February 2018, 11:47 | #13 |
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Anyway, to answer your question
Both the SID and AY-3-8910 have a range of about 8 octaves (which, as you may notice, is not half the 9 octaves), so the claim of Paula outputting 9 octaves seems correct. |
27 February 2018, 11:59 | #14 |
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Even if it has a range of 9 octaves, that doesn't say anything about the audio quality. It is well known that the DAC produces a lot of overtones which the analog low pass filter is meant to attenuate. If this filter is disabled, you cannot play back a low frequency tone without very clear distortion. With the filter enabled, the frequency range is much limited and surely much smaller than 9 octaves.
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27 February 2018, 15:00 | #15 |
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The one thing you are all forgetting, is that The Amiga sound chip was the best once!! At least when it was first introduced. Back then, Amiga sound was supremacy!
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27 February 2018, 15:15 | #16 |
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Interesting thread. But I thik the range of human hearing is higher than 9 octaves. Humans are regarded as hearing from about 20Hz to 20,000Hz. Octaves relate to a doubling of frequency, so:
C0 = 16.35Hz <- Not many people can hear this low a frequency ... C8 = 4186.01Hz <- This is a high-pitched C note C9 = 8372.02Hz <- This is another octave up C10 = 16744.04Hz <- Very squeaky - almost painful for some! But Eb10 = 19912.12Hz, which is really high-pitched. You could probably find folk with hearing sensitive enough to go even higher. Not sure if Paula can pull this off, but if she can, then we could sample Bjork!! |
27 February 2018, 15:25 | #17 |
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9 octaves seems to be advertising bullshit. Practically you where limited to only 3 octaves (C-1 to C-3 = Protracker notes) with C-1 = ~4kHz and C-3 = ~16kHz. Limit was around 28kHz (B-3). This was the default in the past. With double scan screen modes you can double the frequency = 56kHz max.. C-4 =~32kHz and C-5 = ~64kHz. Count the "octaves". With DigiboosterPro for example you can use C-1 to C-8 (but here C-5 is ~16kHz).
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27 February 2018, 15:35 | #18 |
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That refers to the playback sampling frequency. If you have a 100 sample long single period of a sine wave and you play it back as C-1, it would produce a tone of 40 Hz.
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27 February 2018, 15:51 | #19 |
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What about Scream Tracker sounds/Mods, they are that good that I would say it was on par with Sound blasters, of the past!
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27 February 2018, 15:59 | #20 | |
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Quote:
Correct me if I'm wrong, but didn't SID and the AY have a pitch range of something like 0-65535? All I remember was that POKEY had 0-255, and I've experienced for myself and read so often that a lot of the notes were out of tune, the increments were so large. I would imagine Paula has the 0-65535 range as well, for such fine pitch control in things like racing games for the engine sound. That's what I thought, as I said before I can only hum a pitch at three octaves at most, without straining my larynx. I thought back then it seemed a bit much, but then it occurred to me that the samples themselves could be low and high frequencies, so maybe that's how the range was increased. Last edited by Foebane; 27 February 2018 at 16:10. |
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