darrenyeats wrote: > Right, the problem would be with conversion to PCM. > Darren
Both programs that I know of which convert DSD to PCM have several different filters available so there would not be a "problem" just a different filter from that used by a given SACD player. For example here is the filtering information for the Korg AudioGate program, copied from the user guide (minus the images but still understandable): > 2.8 MHz DSD Filter > Sets the additional filter for the conversion from 1 bit/2.8 MHz songs > to 176.4 kHz or 192 kHz PCM files. > Off > The additional filter will not be applied. > Soft Roll-off ( 3 dB @50 kHz) > Applies a low-pass filter with soft roll-off. > Sharp Roll-off ( 3 dB @42 kHz) > Applies a low-pass filter with sharp roll-off. > Normalize > This specifies whether normalization (increasing the level as high as > possible without creating distortion) will > be applied. If you enable this, the GAIN of each song will be > automatically adjusted to the optimal value. > Off > Normalization will not be applied. The volume level after conversion > will be according to the original GAIN > setting. > Individual Songs > Each song will be normalized individually to its respective maximum > volume. The original GAIN setting > will be completely ignored. > Current Songlist Selections (avg. level) > The maximum peak from all songs being exported will be found, and the > songs will be normalized while > preserving the volume balance between songs. > Select > Select > 31 > The original GAIN setting will be used to adjust the balance between > songs. > When you use normalization, the automatically-adjusted GAIN will be > indicated in blue text while the > files are being exported. > In general, converting the sample rate will require samples to be > interpolated, possibly causing the peak > levels to be slightly higher than the original data. If the song's peak > level was already close to 0 dB before > normalization, the GAIN may be automatically adjusted to below 0 dB. > 1-bit audio data may contain loud sounds that exceed the limits of PCM. > If normalization is applied when > converting 1-bit audio to PCM, the GAIN may be automatically adjusted to > about -3.0 dB. > When exporting in 1-bit audio format, normalization is applied > referenced to 0 dB-SACD, but in some > cases the output data may slightly exceed the reference value (i.e., the > level meter indication may exceed 0 > dB). Even in this case, the signal is far lower than the theoretical > clipping level for 1-bit audio, so there will > be no problem with the exported data as long as the clip indicator does > not light. > When normalization has completed successfully, and export or disc > creation has ended, a dialog box will ask > Do you want to load the normalized gain setting to the songlist? If > you choose Load, the GAIN setting > used for normalization will be applied to the Song settings for each > song. > By applying the GAIN used for normalization to the Song settings of > each song, and then exporting > with the Normalize box set to Off, you can greatly reduce the > processing time for subsequent exports. > However if you've changed the output sampling frequency, the peak values > of the output data will change > slightly, so you'll need to execute normalization once again. > Dither > Here is where you can choose the dither settings for exporting the > results of the internal high-precision calcu-lations as 16/24-bit data. > None > The results of the internal calculations are rounded up or down to > 16/24-bit data. If the volume of the song is > sufficiently loud, there will be no particular problems even with this > setting. > TPDF Dither > Standard white noise dithering will be applied. The noise floor will > increase slightly, but distortion components can be completely > suppressed. > Choose this if you'll be continuing to edit using another application > after exporting the song. > KORG AQUA > This method takes into account the characteristics of human auditory > perception, producing a higher quality master by limiting the increase > of quantization noise in important frequency regions. > Select > 32 > Choose this if you're exporting a song as the final master. > AudioGate is able to automatically detect situations in which dithering > is not necessary. Even if dithering > is set to TPDF Dither or KORG AQUA, this setting may be ignored in > some cases to avoid any > increase in noise. ------------------------------------------------------------------------ ralphpnj's Profile: http://forums.slimdevices.com/member.php?userid=10827 View this thread: http://forums.slimdevices.com/showthread.php?t=97944
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