Term
| What does sample rate measure? |
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Definition
| Frequency and Amplitude (voltage) |
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Term
| What are 6 primary sample rates? |
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Definition
| (32) 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz |
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Term
| Sample period is _______ of sample rate |
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Definition
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Term
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Definition
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Term
| Sample rate captures the _______ of a wavelength. |
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Definition
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Term
| When is dither applied in signal flow? |
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Definition
| After preamp, before anti-aliasing filter |
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Term
| What is the Nyquist Theorem? |
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Definition
| Samples must be taken at least twice per analog frequency in order to obtain an accurate representation |
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Term
| The difference between sample rate measurement and actual sample voltage creates: |
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Definition
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Term
| How do you eliminate alias frequencies? |
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Definition
| Brick wall filter/Anti-aliasing filter |
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Term
| Why is 44.1kHz used instead of 40kH? |
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Definition
| To make room for anti-aliasing filter |
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Term
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Definition
| 0's and 1's, right after one another |
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Term
| What does a multiplexor do? |
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Definition
| Splits data (binary words) into parts for faster movement |
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Term
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Definition
| Bit 17 of a 16-bit word. It counts word length and determines if it is a 0 or 1 (even or odd) |
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Term
| What are error correction bits? |
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Definition
| Bits 18 and 19 of a 16-bit word |
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Term
| What do CRCC do? What does it stand for? |
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Definition
| Cyclic Redundancy Check Codes fix errors |
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Term
| What are 4 components making up standard CD parameters? |
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Definition
AIFF filtype
16-bit bit-depth
44.1kHz sample rate
Stereo Interleaved file format |
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Term
| What are the letters to help remember the recording chain? |
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Definition
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Term
| What do the letters in the recording chain stand for? (SPA SAM ERD) |
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Definition
Signal Source
Preamp
Anti-Alias File
Sample/Hold Circuit
ADC
Multiplexor
Error Correction
Record Modulation
Digital Out |
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Term
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Definition
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Term
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Definition
| Square graph representing bit-depth by reading binary word lengths |
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Term
| What was the first digital tape machine? |
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Definition
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Term
| On a CD, what do the dimples represent? |
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Definition
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Term
| What is the main advantage of using PCM vs. Analog Headstacks? |
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Definition
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Term
| What are the letters to help you remember reproduction? |
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Definition
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Term
| What do the letters stand for in reproduction? (REM ASA LA) |
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Definition
Record Modulation
Error Correction
Multiplexor
ADC
Sample/Hold Circuit
Anti-Alias Filter
Line Amp
Analog Signal |
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Term
| What does LSB stand for? What is it? |
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Definition
| Least significant bit. Lowest bit-depth number of a signal |
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Term
| What is a quantization error? |
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Definition
| The difference between actual voltage and where it registers |
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Term
| What does quantization error cause? (2) |
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Definition
Dynamic range reduction by 6dB
Snaps and Pops |
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Term
| How do you fix quantization error? |
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Definition
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Term
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Definition
| NO, the end result generates white noise |
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Term
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Definition
| Signal that is added to LSB. It randomizes/decorrelates quantization error around LSB (causes 3dB increase in noice floor) |
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Term
| What does applying dither result in? |
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Definition
-3dB increase of noise floor
-Can still hear analog signal |
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