Visualizing the Human Voice

on YouTube ↗33m

" summary

Shows how to capture, render and visualize human voice on Android using AudioRecord for real‑time input and AudioTrack for low‑latency playback, with concrete settings (PCM 16‑bit, 44.1 kHz recommended, mono typical) and using getMinBufferSize to compute chunk sizes. Demonstrates drawing a waveform in a RecyclerView (~25 bars/sec) and adjusting LinearSmoothScroller speed per pixel because buffer sizes vary by device, explains using Visualizer for playback, streaming large files to avoid OOM, running audio work on background threads, and recommends Oboe (API 16+, AAudio on 27+) for consistent performance.

AI-written summary · about

" chapters (11)

1. 0:00Introduction
2. 1:23Android audio basics
3. 2:25MediaRecorder vs AudioRecord
4. 5:16Media settings
5. 12:06Playback APIs
6. 16:42Streaming with AudioTrack
7. 19:19Audio processing tips
8. 20:37Voice waveform visualization
9. 24:12Visualizer class guide
10. 26:52Low-latency audio libraries
11. 31:21Summary

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