What are the common myths and misconceptions about PCM and DSD audio quality?

1 What is PCM?

PCM stands for Pulse-Code Modulation, and it is the most widely used format of digital audio. PCM converts analog sound waves into discrete samples, each represented by a binary code of bits. The quality of PCM depends on two factors: the sampling rate and the bit depth. The sampling rate is the number of times per second that the sound is measured, and the bit depth is the number of bits used to encode each sample. The higher the sampling rate and the bit depth, the more accurate the PCM representation of the sound.

2 What is DSD?

DSD stands for Direct Stream Digital, and it is an alternative format of digital audio that was developed by Sony and Philips for the Super Audio CD (SACD). DSD converts analog sound waves into a stream of single-bit samples, each represented by a 0 or a 1. The quality of DSD depends on one factor: the sampling frequency. The sampling frequency is the number of times per second that the sound is switched between 0 and 1. The higher the sampling frequency, the more accurate the DSD representation of the sound.

3 PCM vs DSD: Which one sounds better?

There is no definite answer to this question, as different formats may suit different preferences and applications. However, some of the common arguments in favor of PCM or DSD are based on misconceptions or myths. For example, PCM can achieve very low levels of distortion and noise with proper dithering and filtering techniques, while DSD also requires noise shaping and filtering to reduce its single-bit design's high-frequency noise. Additionally, DSD does not capture the full dynamic range and frequency response of the analog sound due to its lower signal-to-noise ratio and narrower bandwidth. On the other hand, PCM can capture more details and nuances of the sound with higher bit depths and sampling rates. Furthermore, PCM is more widely supported by devices and software than DSD, but DSD can also be converted to PCM or other formats with minimal loss of quality. Additionally, DSD can offer some advantages in terms of storage space and playback speed.

4 How to choose between PCM and DSD?

Choosing between PCM and DSD depends on personal preference, listening environment, and audio equipment. To determine which format is best for you, consider your ears and how they respond to each format. Additionally, look at the source material and determine if it should be preserved in its original format or converted to another. Lastly, check the specifications of your output devices and software to ensure they are compatible with the chosen format. Ultimately, the best way to decide is to listen to both formats and compare them yourself.

5 What are some examples of PCM and DSD audio files?

If you want to experience the difference between PCM and DSD audio quality, you can find various examples of audio files in both formats online. HDtracks offers high-resolution PCM audio files in formats like FLAC, ALAC, WAV, and AIFF. NativeDSD provides high-resolution DSD audio files in formats such as DSF, DFF, and DXD. Additionally, 2L offers free samples of PCM and DSD audio files in formats like FLAC, ALAC, WAV, DSF, and DFF.