iSRC – synchronous sample rate converter and requantizer.
What means higher quality sample rate conversion tool.
What means your digital may sound better than you think.
Try free demo and buy full iSRC mastering version. Full version can be ordered here.
Each studio involved in digital sound processing is converting sampling rate or requantizing audio files constantly. This conversion is required by customers or equipment itself, or occurs implicitly inside digital devices and algorithms used in the studio. Such operations result in more or less painful degradation of the original sound quality, what makes part of the sound engineer, and the artists themselves work somehow wasted. This does not need to happen. Nykiel-Audio offers an unique tool to solve this problem.
Use cases
iSRC is a synchronous sample rate converter and requantizer designed for audio files (iSRC stands for integer sample rate converter). It is used to convert various sample rates and bit resolutions without subjective quality loss. The most common applications which typically lead to significant sound quality degradation are:
- converting dense files to consumer formats (with or without sample rate conversion), i.e. 44.1/24, 96/24, etc to Audio CD format (44.1/16)
- converting digital audio files from various sources, recorded at different frequencies and densities to a common format,
- converting floating-point formats (32b/64b) to integer formats. Most programs use floating point samples internally, while DA converters use integer formats. Conversion is made in automatic and implicit way. ISRC allows to control this process, what significantly makes the sound quality better.
- removing quantization errors coming from previous processing stages, what is done by converting to the same frequency and the same bit depth.
- increasing the sampling rate before non-linear operations such as compression / limitation or equalization, which always sound better at higher sampling rates.
Demo available!
Download a free trial version with the following restrictions:
- 10 seconds nag screen,
- converting up to 60 seconds of audio file,
- processing of up to two files simultaneously.
iSRC 1.4 Demo for Windows (XP/Vista/7) installer download (UPDATED 19.02.2012!):
- release date: 19 February 2012,
- size: 7.5 MB,
- SHA256: f0707389508fff0a40aac02fdf55a99656fb2b5b89aa0239accc38d8a174d9f5
iSRC 1.4 Demo for Mac OS X (10.5+) installer download (UPDATED 19.02.2012!):
- release date: 19 February 2012,
- size: 22 MB,
- SHA256: 4b13de9c3bf5c8076570f15408ce1c7cc847d1f855cac21f09a0cde455ef8cb5
Full mastering version available now!
iSRC 1.4 Full mastering version – order here:
- available for Mac OS X (10.5+) and Windows (XP/Vista/7),
- no nag screen,
- no limit on file length,
- unleash full power of your computer – multicore processing fully enabled.
Technical details
Supported file formats (reading and writing):
- Waveform Audio File Format (WAVE, WAV),
- Audio Interchange File Format (AIFF).
Supported sample rates (reading and writing) in kHz:
- 32.0 (only reading),
- 44.1,
- 48.0,
- 88.2,
- 96.0,
- 176.4,
- 192.0,
- 352.8,
- 384.0.
Supported sample formats and number of channels:
- 8, 16 and 24 bits long fixed point samples,
- 32 and 64 bits long floating point samples,
- up to 16 channels.
System requirements
Mac OS X version:
- Mac OS X 10.5 “Leopard” or newer,
- 50 MB of free HDD space.
Microsoft Windows version:
- Microsoft Windows XP or newer,
- 50 MB of free HDD space,
- at least 512 MB of RAM.
How to test converters?
Experience shows that the same AD/DA converters sound different at different sample rates and different numbers of bits – is it better or worse depends on the characteristics of the converter. In order to subjectively verify sample rate converter make the following test: convert the selected files to the desired frequency and then back to the original one. Then compare the original file and the one which was converted twice. This is to eliminate the impact introduced by DA converters themselves.
Support
In case of question or problems with iSRC don’t hesitate to write us:
isrc-support@nykiel-audio.pl
