PCM

The representation of sound as a sequence of numerical values is commonly known as a raw audio file, with Pulse-code modulation (PCM) serving as the underlying format. Notable instances of this format include WAV files within the Microsoft Windows environment, generated by applications like "Sound Recorder," and AIFF files on Apple platforms. These files adhere to the PCM format, often accompanied by an initial header. This format finds widespread application in PC and mobile device audio protocols, requiring voltage levels between 1.8V and 3.3V and relying on signals such as CLK (clock) and Data for communication.

Logic Analyzer

TB3016E

TB3000 series Specifications PDF

MSO2116E (w/ analog channels)

MSO2000 series Specifications PDF

PCM Packet

Audio

Save as TXT/CSV

In Logic Analyzer mode, click the icon above the report area to save the decoded data as a TXT/CSV file.

PCM Decoding Setup Steps

1. Click Quick Settings or Add Protocol Decode to select a protocol for logic analyzer capture.

2. Select PCM for decoding.

3. If you use Quick Settings, the system will recommend configurations for trigger type, sampling rate, voltage threshold, and channel settings.

4. Click the icon to access the Decode Settings screen.

Decode Settings

Channel: Show the selected channels.

Mode: PCM working mode

Channel Count: PCM supporting Channel

Latch Edge: Clock latching edge

Start Pulse: CS Start Pulse

Sound Reduction: PCM audio playing & save as .wav

PCM Decoding Examples