Test
Vozonda or NotebookLM? You decide, blind.
Two short blind tests on the same sources, default settings on both sides. The script test judges the writing, the voice test judges the voices. Every vote is published; results update every five minutes.
Test 1 · script
Script test: read and pick
What Vozonda really does is write the conversation. Here you read the same part of two episodes about the same source, as plain text, without voices or names. Which one explains the topic better?
The test needs JavaScript.
Test 2 · voices
Voice test: listen and pick
This one mostly judges the voices. In Vozonda the voice engine is swappable (Kokoro on the CPU, Qwen3-TTS on a GPU, Voxtral in the cloud, more to come) and keeps improving; these clips use the default local Qwen3-TTS voices. We redo this test whenever a better engine becomes the default.
The blind test needs JavaScript.
Method and fine print (both tests)
- Script test: about 150 words from 30 % into each episode, cut at sentence ends, as plain text without speaker names. Vozonda: the episode script, default settings, unedited. NotebookLM: a Whisper transcript of its Audio Overview, so it keeps the spoken fillers.
- Pairwise preference test with a "no difference" option, as used to evaluate speech synthesis. A and B are in random order for each visitor.
- 60 seconds from 30 % into each episode, so the intros do not give it away; loudness normalised to −16 LUFS (EBU R 128); same format and bit rate.
- Default settings on both sides; Vozonda used local Qwen3-TTS voices and an unedited script. Nothing was regenerated or picked.
- One vote per pair and visitor. No cookies; duplicates are caught with a salted hash, no IP address is stored with the votes, server logs are deleted after 14 days.
- Raw data: results.json · votes.csv, updated every five minutes.
Results
Results so far
Live from the published votes. A percentage appears once a pairing has 20 votes with a preference.
Script test
| Source | Against | Prefer Vozonda | Prefer the other | No difference | Votes |
|---|---|---|---|---|---|
| Loading… | |||||
Voice test
| Source | Against | Prefer Vozonda | Prefer the other | No difference | Votes |
|---|---|---|---|---|---|
| Loading… | |||||
Raw data: results.json · votes.csv, updated every five minutes.