What is pcm audio? a detailed guide in 2023

Pcm audio, also known as pulse modulation, is a method for the digital representation of sampled analog signals. It is the standard form of digital audio in computers, CDs, digital telephony, and other digital audio applications. In a PCM stream, the amplitude of the analog signal is sampled regularly at even intervals and each sample is quantized to the nearest value in a range of digital steps.

Does PCM Audio gives surround sound?

The PCM can transmit surround sound, but not over an optical cable. The optical cable can only carry stereo PCM (using TOSLINK, the home stereo standard). To send a surround PCM, you must use an HDMI cable (or a display connection on a PC) that carries both the video and audio signals.

The optics can “bitstream” the surround, which means that the originally encoded signal is sent over the cable instead of first decoding it into a PCM signal. This shouldn’t cause any problems or degradation as long as the device you’re sending to (here the soundbar) can decode it. While I can’t say for sure, I imagine that most of the surround content you produce from a Smart TV source is Dolby Digital, which should be supported by any soundbar with optical input. If you are using HDMI, the decoded PCM signal or bitstream can be passed on to the source if the soundbar supports it. However, choosing the former avoids compatibility problems that can arise.

PCM audio in TV

The PCM audio function of a TV allows the TV to convert an analog signal to a digital signal. The PCM process involves sampling the signal at regular intervals because it regularly takes a measurement of its bit depth before converting it to binary code.

PCM or Bitstream? Which is best for receiver setup?

The bit stream to the receiver means that the receiver receives undecoded information directly and the receiver then decodes it.
PCM to Receiver means your source decodes the information to PCM and sends it to the Receiver.
Bitstream is preferable if you want to decode all information from the receiver.
Some old receivers (10 years old) cannot understand new audio formats like dolby truehd or dts hd, but they can understand PCM. In this case, pcm is better and the only option.
Bitstream is better, but it’s basically the same for stereo sources, unless the pcm decoding of your sources is pretty bad. For new audio formats, bitstream is always better.
Until 5.1 sound, it is your decision to choose pcm or bitstream on this bitstream.
Direct mode doesn’t change anything, you get what’s in the signal – is it stereo or 5.1 or something.

Is PCM better than Bitstream?

Usually no, and you can’t tell the difference in audio quality if you choose one over the other. The DACs (digital-to-analog converters) in most modern audio devices are capable of producing high quality sound. So take some time to consider whether you should allow your Blu-ray player to decode digital tracks instead. Your receiver is a moot point. I know there are plenty of high-end DACs out there, and some audiophiles will claim to hear a difference, or at least suggest that DAC A sounds so much better than DAC B in reviews, but there’s no way to tell whether they ‘you have a confirmatory bias, you lie thoroughly, or can actually distinguish between the two.

One area where PCM is preferable to bitstream is when you want / want to hear the secondary audio portions of movies, e.g. B. Audio commentary tracks, sound effects when navigating through the main menu options, etc. When doing an ABX comparison, you will almost certainly find that you cannot tell the difference between the two.

PCM or Dolby Digital better with a soundbar?

When you listen to PCM, you get stereo sound at most. To get surround sound, you need Dolby Digital, DTS, etc.

Many claim that PCM audio sounds better than Dolby. Having worked professionally with both since the early days of home theater audio, I don’t really see the difference.

Technically the PCM is superior, but what matters to me is its sound.

Does PCM support multichannel audio?

PCM is a file type name commonly known as .wav (Windows Audio). It will only play on Windows operating system. It carries the right and left channels for stereo. If you can connect your Windows PC to the Dolby 5.1 amplifier, it should play in enhanced surround sound.