■ 英文サンプル
Some of the more affordable sound cards and D/A converters have
suboptimal digital and analog filters, while still having support for
higher sampling rates. Effect of this can reduced by applying high
quality upsampling in software before feeding the signal to the audio
hardware at higher rate. This moves some of the artifacts of the
suboptimal hardware to higher frequencies, away from the audible band.
Many of the home- theater amplifiers also re-sample internally to 48, 96
or 192 kHz, with the HQPlayer, these can be fed at the native rate.
This is analog-sounding filter, especially suitable for recordings containing strong transients, long post-echo is a side effect (not usually audible due to masking). A really steep IIR filter is used. This filter type is similar to analog filters and has no pre-echo, but has a long post-echo. Small amount of pass-band ripple is also present. IIR filter is applied in time-domain. This filter performs better when resampling with only factor of 2 or 3 and somewhat worse at factor of 4 and higher.
■文字数,ワード数の訂正
MS Wordでカウントした場合,文字数で31000文字,ワード数で5300ワード程度です。