（Audacityに取り込み、正規化（-3dbに増幅後）-90dbFS(≒20log2^ 9bit-144)という微小レベルの波形は、まだ 9bit 分の分解能を有していますので綺麗な正弦波で再現されています。 sin1khz -90db24441.WAV ダウンロード. DSD which stands for Direct Stream Digital is a specific format of digital tracks - More details here To play DSD files, we recommand you to use the USB capability of your Expert product. In view of the size of content on a DSD format, Devialet Air won't be able to run a smooth transportation of all informations which is in a DSD. I’m pretty sure you’ve heard of Audacity. The free and open-source software is mentioned on almost every single audio editing thread out there, and for good reason. Like I said, Audacity is free, like completely free, and that makes it the most easily accessible software to anyone looking to get started with audio editing.
# Tools you need
For audio downsampling you need these tools:
ffprobe(of the FFmpeg framework);
sox(SoX — Sound eXchange).
On a Mac install it with Homebrew:
Audacity Daddy Nana Jio
# Probe the original audio file
To get the sampling rate of the original audio file, use the
# Determine the sampling rate your device supports
First, you have to find out the maximum sampling rate your device supports. Forexample, the maximum playback sampling rate the iPod Classic (Gen. 6) supportsis 48 kHz.
The rule of thumb when downsampling is to divide the original sampling rate bya power of 2. Hence, when downsampling a 192 kHz audio, the target sampling rateshould be 96 kHz (2:1 decimation) or 48 kHz (4:1 decimation). When downsamplinga 176 kHz (176.4 kHz, actually) audio, the target sampling rate should be 88.2kHz or 44.1 kHz (2:1 and 4:1 decimation, respectively).
# Downsample with SoX
sox is relatively easy, you just have to use the rateeffect. You also have to set the phase and the quality. The SoXFAQ states:
Resampling is a series of compromises so there's no one true answer for allsituations, but the following rules of thumb should cover most people's needsfor 99% of the time:
- Phase setting: if resampling to < 40k, use intermediate phase (
-I)otherwise use linear phase (
-L, or don't specify; linear phase is thedefault).
- Quality setting: if resampling (or changing speed, as it amounts to thesame thing) at/to > 16 bit depth (i. e. most commonly 24-bit), use VHQ(
-v), otherwise, use HQ (
-h, or don't specify).
- Bandwidth setting: don't change from the default setting (95%).
- If you're mastering to 16-bit, you also need to add dither (and in mostcases noise-shaping) after the rate.
If you want to downsample a Hi-Res 192 kHz audio to 48 kHz (e. g. for an iPodClassic), you should use the rate effect with linear phase (the default one)and the highest quality (VHQ). You can use the
--guard option toautomatically invoke the gain effect to guard against clipping.
If you're mastering to 16-bit depth:
# Downsample multiple files in parallel
Audacity Dsd Mac
To downsample a bunch of files in parallel you can use the GNU
parallelutility to run
sox. By default
parallel will run as many jobs aspossible bringing all the CPU cores into play.
On a Mac you can install
parallel with Homebrew:
Audacity Daddy Nana Jio Song
For example, let us downsample all the Hi-Res FLAC files in the currentdirectory and its subdirectories and set the bit depth to 16 bits.
find to find all the files with names ending in
.flac and pipe theoutput to
--tmux to be able to view all the jobs in a
tmuxsession in real time. Use the option
--eta to see the progress information.
After the downsampling is finished, you can inspect the logs for errors andwarnings.
You can use