To calculate the required sampling rate
The optimal sampling frequency of your Audio recording, depends on what you value: Any sample rate is a compromise of sound quality, speech intelligibility, file size and compatibility:
- In General, the conversion of Sample rates, the following applies: Since, however, rarely loss does not work, you should always perform all of the steps in the target sample rate.
- This relates to the recording, playback and editing, such as Cutting and Adding effects.
- With a sampling rate of 44.1 kHz for Audio CDs and is typically 48 or 96 kHz for DVD and Blu-Ray is.
- Otherwise, the Nyquist-Shannon Theorem: The sampling rate fₓ should be at least twice as high as the critical frequency fᵨ, i.e., highest recorded frequency, so fₓ > 2 × fᵨ.
- You do not want to choose the sample rate so that they do not exceed a certain file size G with the following formula:
- The size of the file G of a PCM recording, so of uncompressed WAV or AIFF files, you can calculate as follows: G = D × fₓ × number of Audio channels × recording time, where D is the sample depth and the duration in seconds is specified. In the case of MP3 and AAC, you expect G ≈ bit rate × recording period.
- Unlike the sample rate is the sample depth. More Bit can damage the quality, you would take in the worst case, an unnecessary amount of computing time and storage space, or are incompatible with cheaper Hardware.
- It is even common, that digital audio effects to reckon internally with 32 Bit, even if you have to spend at the end of only 16 to 24 Bit.
- You need a timing accuracy of less than 23 microseconds, you need to set the sample rate higher than 44100 Hz.
- DVDs support for Mono and Stereo, up to 192 kHz, in the case of more channels, at least 96 kHz. Blu-Ray support up to six channels of 192 kHz, or up to eight channels of 96 kHz. Make sure that your playback device such high Sample rates and mastered.
- In the case of Apple, only a few devices can use a sample rate of 192 kHz: MacBook Pro (Retina, 13 - or 15-Inch 2013), Mac Pro (late 2013), iMac (21.5-inch, mid 2014) and Mac mini (late 2014).
- A sample rate of 32 kHz is considered to be quality of Audio cassettes, which do not record the entire audible spectrum and play, but up to about 14.5 kHz range.
- For voice recordings, a good understanding of the language to achieve a small file size, a recording with 22050 Hz sample rate with subsequent conversion to MP3 or AAC with 56 to 64 Bit per channel.
- With a sample rate of 8 kHz, you will not quite match the quality of telephone-Transfers, or some Mini-dictation devices.
- By the way: the pure pitch course of tunes to record, regardless of sound quality, rich men and about 1400 Hz in the case of women are more likely to 1800 Hz.
Normally, each digital recording device has a built-in low-pass Filter that eliminates all frequencies above the critical frequency. This is not the case for you, generate high frequencies, low frequency noise in your recording. Filter in this case either, even the Signal before recording or you can record at the highest sampling rate and to convert the recording afterwards. We will show you various CHIP Online practical tips on how to both language as well as E-Piano and E-guitar and E-Bass record.
