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Old 01-05-2021, 02:08 PM
2crows 2crows is offline
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Default PT cert

hello , i have started taking the PT cert course, my question is , how do you retain the information about Hz and bit rate ect . with nothing to relate it to, i am trying to memorize it but it doesn't stick,
thankx
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Old 01-05-2021, 02:48 PM
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Ben Jenssen Ben Jenssen is offline
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Default Re: PT cert

Shooting from the hip, here; in Setup menu you'll find "Session", which shows the session info.
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Old 01-07-2021, 11:07 AM
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EdgarRothermich EdgarRothermich is offline
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Default Re: PT cert

Quote:
Originally Posted by 2crows View Post
hello , i have started taking the PT cert course, my question is , how do you retain the information about Hz and bit rate ect . with nothing to relate it to, i am trying to memorize it but it doesn't stick,
thankx
I'm not sure I understand your question, what information are you referring to?
Are you sure you mean "Bit Rate" and not "Bit Depth"

BTW: THe Session Dialog in Pro Tools has no information about Bit Rate because this is a unit used for compressed audio files like mp3 or AAC.
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Old 01-11-2021, 01:51 PM
2crows 2crows is offline
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Default Re: PT cert

hay , thanks , i guess i dont know enough about it yet to even ask a question,
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Old 01-11-2021, 02:36 PM
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Default PT cert

Quote:
Originally Posted by 2crows View Post
hay , thanks , i guess i dont know enough about it yet to even ask a question,

You simply need to understand the process of sampling and quantizing.

The compact disk standard sampling rate is 44.1 kHz. To state it simply, that means the audio is sampled 44,100 times per second.

The compact disk quantization standard is 16-bit. That is, 16 binary bits are used to measure the amplitude and polarity of the audio waveform per sample.

The only other thing you should know is the Nyquist theorem which states that a sampling rate can recover any frequency up to half of said rate. So, on paper this means a compact disk can play back frequencies up to 22.05 kHz.

If you can understand this, you can grasp that there can be different sampling rates, and different quantization levels (bit depths).
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Old 01-12-2021, 11:50 AM
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Default Re: PT cert

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Originally Posted by Top Jimmy View Post
You simply need to understand the process of sampling and quantizing.

The compact disk standard sampling rate is 44.1 kHz. To state it simply, that means the audio is sampled 44,100 times per second.

The compact disk quantization standard is 16-bit. That is, 16 binary bits are used to measure the amplitude and polarity of the audio waveform per sample.

The only other thing you should know is the Nyquist theorem which states that a sampling rate can recover any frequency up to half of said rate. So, on paper this means a compact disk can play back frequencies up to 22.05 kHz.

If you can understand this, you can grasp that there can be different sampling rates, and different quantization levels (bit depths).
And one more important thing you have to know in that context is that Bit Depth is often confused with Bit Rate:

Another term for Bit Depth is Resolution or Bit Resolution with the units of bit (16bit, 24bit).
However, Bit Rate is a different thing with the unit of "bits per second" which is used to describe compressed audio file (mp3, AAC), when you choose to encode your audio file in one of those formats, you will find a selector that gives you the option to choose the Bit Rate. Of course, higher is better.

Here is a screenshot of Pro Tools when you bounce to mp3 and ou can choose the Constant Bit Rate from the selector. The unit here is kbit/s = kilobits per second".
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File Type: jpg Bit Rate.jpg (64.2 KB, 0 views)
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