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ManualsBrandsMagix Xara ManualsApplicationsSamplitude
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Table Of Contents
EFFECTS MENU 545
Sample manipulation
Change sample rate (offline)
Use this function to change the sample rate of a wave project.
If the sample rate is increased, the change is almost completely without loss. However, the
required memory space does increase.
If, however, you reduce the sample rate, a loss in harmonics quality occurs. When halving
the sample rate of a 44.1 kHz sample to 22.05 kHz, the frequency response of the
resulting signal is limited to 11.025 kHz. The frequency response always corresponds to
half of the sample rate.
By clicking on "OK" you can enter the file name for the new project.
Quality
When reducing the sample rate you can enter the quality that should be used in the anti-
aliasing filter or when increasing the sample rate in the reconstruction filter (interpolation).
Standard: At this quality level faster interpolation algorithm is used, which is also applied
during real-time resampling.
High: In addition to the "standard" quality level, a filter is set to dampen the alias
frequencies or to improve the reconstruction (interpolation). When using extreme
conversion ratios, such as converting from a 48 kHz signal to a 22 kHz signal, this setting
may improve the results.
Very high: Here the linear-phase UTR – "Ultra-transparent resampling" algorithm is used.
Extremely high 1: In addition to the "Very high" quality level, this algorithm works at a
higher filter setting. CPU load increases dramatically.
Extremely high 2: In addition to the "Very high" quality level, this algorithm works at a
considerably higher filter setting. Using this setting is only sensible for 32-bit float files as
the maximum possible artifacts from aliasing are under 96 dB.
Hint: You can carry out the sample rate adjustment while recording and playing. The
quality of the resampling used here can be set in the "Options menu > Program
Preferences > Resampling Quality Options... (view page 703)".