4
votes
Why do MP3 files have a sample rate? (When they are just composed of sine waves)
Digital sound files are not made up of sine waves - You may be thinking of FM or West Coast synthesis where sine waves are used to modulate other sine waves to generate more complex waveforms.
You ...
- 839
4
votes
Why sample at 196kHz when human ear can only hear within a 20kHz range?
A digitally sampled signal always is a representation of an analog signal. The proper process of going from analog to digital without oversampling involves applying a perfect lowpass filter cutting ...
- 49
3
votes
Source localization on a laptop
How do I input two mics simultaneously on a Laptop?
To be able to input two mics simultaneously on a laptop, you need a two channels audio interface with two mic inputs. Using one interface for both ...
- 2,834
3
votes
Sampling a Midi file with a sound file?
The most widely used standard for specifying sounds for a MIDI synthesizer is SoundFont, which contains all samples and control information in a single file.
You need some SoundFont editing tool, and ...
- 811
3
votes
Accepted
Is it possible to record higher frequencies using multiple microphones sampling in lockstep?
frequencies above what microphone allows
Microphones have a frequency response curve. This is a random example:
The exact shape of the diagram is different for each microphone, but they all have ...
- 1,578
3
votes
Why sample at 196kHz when human ear can only hear within a 20kHz range?
The reason people use higher frequencies than the Nyquist Theorom suggests (which states the lowest sampling frequency for a given bandwidth that won't cause aliasing) is that during the editing ...
- 2,516
2
votes
Why sample at 196kHz when human ear can only hear within a 20kHz range?
I like to use frequencies higher than 48kHz for two reasons:
It provides more scope for slowing a sample down and retaining some degree of 'interest' (previously inaudible elements become audible)
...
- 146
2
votes
Pitch-Shifting makes sample sound out of tune
I am no expert, but could your guitar have been tuned to Just temperament, instead of Equal temperament?
Correct me if I am wrong, but if one tunes the guitar by the ear, it does not necessarily ...
2
votes
Why sample at 196kHz when human ear can only hear within a 20kHz range?
(this was meant aas a comment to Marc W's answer, but ended up being to long for a comment...)
To further elaborate on the first paragraph of Marc W's answer, capturing frequencies up to 98 KHz can ...
- 721
1
vote
Why do MP3 files have a sample rate? (When they are just composed of sine waves)
Yes, according to https://www.math.utah.edu/~gustafso/s2012/2270/web-projects/Guckert-audio-compression-svd-mdct-MP3.pdf there is a FFT involved in the MP3 compression.
However, the coding is tighly ...
- 627
1
vote
Accepted
Sound sampling rate for insect mapping project
2/ about the audio recorder limitations
Audio recording devices are made to record signals which can be heard. Since our ears are limited to 20kHz, we just need a 40kHz sampling (the 20kHz is the half ...
- 627
1
vote
Getting good result with sox pitch command
You can try freely Reaper which use the Elastique library for pitch bending.
The software should only be used freely for a 60 days evaluation, but it is not that expensive.
Since it is a full DAW, you ...
- 627
1
vote
What is the true definition for the length of a pulse (impulse-type sounds)?
For an application such as this, I think that measurement of the pulse width can be somewhat arbitrary as long as you are measuring all pulses in the same way. For instance, pulses of 200ms or longer ...
- 8,815
1
vote
Why sample at 196kHz when human ear can only hear within a 20kHz range?
I think the answers above whilst informative are over complicated for the OP question. Simple answer.
One word: Interpolation. In post production we will record in the highest sample rates possible so ...
- 242
1
vote
One Shot for drums
Drum samples default is one shot. This is unlike, say, 8 seconds of a violins sample, which will use a release-bound envelope.
There are a few situations where drums aren't one shot:
Practical - ...
- 1,576
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