This is a test by my friend Tom Gefrusti. The procedure employed to test 72 SRCs is this:
1) original native 24/88.2 kHz files (pink noise)
2) downsampling from 24/88.2 kHz to 16/44.1 kHz (with all listed software)
3) oversampling and re-quantization of the scaled files ... 16/44.1 kHz files are brought back to 24/88.2 kHz
4) specular comparison (
Null
Test
Difference) between the native original file and the processed file.
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GREEN = Acoustica v6.0 - No dithering
RED = Acoustica v6.0 - Noise shaping and dithering
PURPLE = Acoustica v6.0 - Noise shaping only
YELLOW = AIMP v4.01 - Dither
BLUE = AIMP v4.01 - no Dither
WHITE = Ashampoo Music Studio v6.1 (no choice of dither and noise shaping)
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GREEN = AudioMove v1.2 - best
RED = AudioMove v1.2 - better
PURPLE = AudioMove v1.2 - good
YELLOW = Audiomuxer 0.9.6.0 - r8brain resampler
BLUE = Audiomuxer 0.9.6.0 - SSRC resampler
WHITE = AUI Converter free v5.6.3 - With dither
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GREEN = AUI Converter v5.6.3 free - No Dither
RED = AVS Audio Converter v8.1
PURPLE = AVS Audio Editor v8.1 - colorized dither, noise shaping A
YELLOW = AVS Audio Editor v8.1 - colorized dither, noise shaping B
BLUE = AVS Audio Editor v8.1 - gaussian dither, noise shaping A
WHITE = AVS Audio Editor v8.1 - gaussian dither, noise shaping B
P.S.: unseen colors are superimposed
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GREEN = AVS Audio Editor v8.1 - Triangular dither, noise shaping A
RED = AVS Audio Editor v8.1 - Triangular dither, noise shaping B
PURPLE = AVS Audio Editor v8.1 - uniform dither, noise shaping A
YELLOW = AVS Audio Editor v8.1 - uniform dither, noise shaping B
BLUE = AVS Audio Editor v8.1 - no dither
WHITE = Awave Studio 10.6 - FIR filter
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GREEN = Awave Studio 10.6 - Linear filter
RED = Awave Studio 10.6 - only downsample
Cockos REAPER PURPLE = V5.17 - Better (384pt Sync)
YELLOW = Cockos REAPER V5.17 - Extreme HQ (768pt HQ Sync)
BLUE = Cockos REAPER V5.17 - Fast (16pt Sync)
WHITE = Cockos REAPER V5.17 - Fast (IIR + Linear Interpolation)
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GREEN = Cockos REAPER V5.17 - Fast (II x2 + Linear Interpolation)
RED = Cockos REAPER V5.17 - Goode (192 pt Sync)
PURPLE = Cockos REAPER V5.17 - HQ (512pt Sync)
YELLOW = Cockos REAPER V5.17 - Low (Linear Interpolation)
BLUE = Cockos REAPER V5.17 - Lowest (Sampling Point)
WHITE = Cockos REAPER V5.17 - Medium (64pt Sync)
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GREEN = dBpoweramp v15.1 - SSRC resampler, no dither
RED = dBpoweramp v15.1 - SSRC resampler, RPDF
PURPLE = dBpoweramp v15.1 - SSRC resampler, TPDF
YELLOW = dBpoweramp v15.1, resampler undeclared (no choice of dither and noise shaping)
BLUE = Dexster Audio Editor v4.4 (no choice of dither and noise shaping)
WHITE = EZ CD Audio Converter v3.1.7 (no choice of dither and noise shaping)
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GREEN = GoldWave v6.21 (no choice of dither and noise shaping)
RED = Izotope RX4 -CD preset [filter steepness 32.0, 0.96 Cutoff shift, Pre-ringing 1.00 (ie linear phase)], MBIT
PURPLE = Izotope RX4 -CD preset [filter steepness 32.0, 0.96 Cutoff shift, Pre-ringing 1.00 (ie linear phase)] no Dither
YELLOW = Izotope RX4 - preset CD [filter steepness 32.0, 0.96 Cutoff shift, Pre-ringing 1.00 (ie linear fasTPDF
BLUE = Izotope RX4 - Custom [filter steepness 32.0, 0.96 Cutoff shift, Pre-ringing 0.00 (ie minimum phase)], MBIT
WHITE = Izotope RX4 -Custom [filter steepness 32.0, 0.96 Cutoff shift, Pre-ringing 0.00 (ie minimum phase)] no Dither
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GREEN = Izotope RX4 Custom [filter steepness 32.0, 0.96 Cutoff shift, Pre-ringing 0.00 (ie minimum phase)], TPDF
RED = Izotope RX4 - Custom [filter steepness 172.0, Cutoff shift 0.97, Pre-ringing 0.1] MBIT
PURPLE = Izotope RX4 - Custom [filter steepness 172.0, 0.97 Cutoff shift, ringing Pre-0.1], no Dither
YELLOW = Izotope RX4 - Custom [filter steepness 172.0, 0.97 Cutoff shift, ringing Pre-0.1], TPDF
BLUE = Izotope RX4 - Custom [filter steepness 434.0, Cutoff shift 1.00, Pre-ringing 1.00 (ie linear phase)], MBIT
WHITE = Izotope RX4 Custom [filter steepness 434.0, Cutoff shift 1.00, Pre-ringing 1.00 (ie linear phase)] no Dither
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GREEN = Izotope RX4 - Custom [filter steepness 434.0, Cutoff shift 1.00, Pre-ringing 1.00 (ie linear phase)], TPDF
RED = MP3 Stream Editor v3.4.4.3163 (no choice of dither and noise shaping)
PURPLE = Nero Recode 2016 (no choice of dither and noise shaping)
YELLOW = Nero WaveEditor v14 (no choice of dither and noise shaping)
BLUE = Nero WaveEditor v14, medium anti-aliasing filter
WHITE = Nero WaveEditor v14, accurate anti aliasing filter steepness 434.0, Cutoff shift 1.00, Pre-ringing 1.00 (ie linear phase)] no Dither
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GREEN = Nero Wave Editor v14, anti aliasing filter fast
RED = OcenAudio v3.0.7 (no choice of dither and noise shaping)
PURPLE = Saracon v01.61 - no dither
YELLOW = Saracon v01.61 - POWr1
BLUE = Saracon v01.61 - POWr2
WHITE = Saracon v01.61 - POWr3
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GREEN = Saracon v01.61 - PDF
RED = TAudioConverter v0.9.9 (no choice of dither and noise shaping)
PURPLE = Waveshop v1.0.14.001 - best (no choice of dither and noise shaping)
YELLOW = Waveshop v1.0.14.001 - fastest (no choice of dither and noise shaping)
BLUE = Waveshop v1.0.14.001 - medium (no choice of dither and noise shaping)
WHITE = XRecode II v1.0.0.223 (no choice of dither and noise shaping)
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The best software + setting is =
Izotope RX4 - Custom [filter steepness 434.0, Cutoff shift 1.00, Pre-ringing 1.00 (ie linear phase)], no Dither
Among the 72 software settings there are others that stand out: dBpoweramp is a great example, also some settings of Saracon. You just need to look out at the maximum bandwidth and the least possible noise which means maximum congruence with native master file.