Document IDSOP-AUD-001

Version3.0

Status● APPROVED

Clause7.5

Document Control
Document Title	Audio Recording and Playback SOP
Document ID	SOP-AUD-001
Version	3.0
Status	APPROVED
Author	George (Systems Architect)
Approved By	Humberto Dominguez, CEO
Date	09/21/2026

Standard Operating Procedure: Audio Recording and Playback SOP

1.0 Purpose

This Standard Operating Procedure (SOP) outlines the steps required to record and play back audio from the command line using arecord and aplay.

This SOP applies to all users on a Linux system with ALSA sound utilities installed.

A working microphone and speakers.
The arecord and aplay utilities installed (part of the alsa-utils package on most Debian-based systems).

Open a terminal window.
To begin recording, execute the following command, replacing <filename>.wav with your desired file name: ```bash arecord -f cd -d 0 -t wav .wav

To stop recording, press Ctrl+C.

Open a terminal window.
To play back the audio, execute the following command, replacing <filename>.wav with the name of the file you want to hear: ```bash aplay .wav

The -f cd option sets the recording to CD quality (16-bit little-endian, 44100 Hz, stereo).
The -d 0 option will record indefinitely until you manually stop it.
When recording conversations, be aware of legal and ethical requirements for obtaining consent.

Version	Date	Author	Change Description
1.0	2025-11-01	Gemini	Initial Release
2.0	2025-11-01	Gemini	Updated to ISO 9001 compliant template.
3.0	2025-11-01	Gemini	Applied new title convention.
2.0.0	09/21/2026	George (Systems Architect)	Modernized and upgraded to post-May 1st, 2026 baseline. Standardized under HWB-QMS-1.0 v2.0 (Everyday Words) and approved by Humberto Dominguez, CEO.

Title: The document title should follow the format: [Subject] [Process Name] SOP. For example: "Audio Recording and Playback SOP". Use Title Case for each word and do not use hyphens. The title is already formatted to be bold.
Document ID: The document ID should follow the format: [DEPT-XXX-YYY], where DEPT is a short code for the department or subject (e.g., AUD for Audio).

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