Datasets:
audio audioduration (s) 3.68 7.04 | mode stringclasses 2
values | text stringclasses 5
values | ttfa_ms float64 0.9 16.9 | audio_seconds float64 3.68 7.04 |
|---|---|---|---|---|
low_latency | Hello! Welcome to VoxCPM2-Turbo, a fast text-to-speech engine that can serve hundreds of people at the same time. | 1.5 | 7.04 | |
low_latency | The weather forecast predicts sunshine for most of the weekend, with a light breeze along the coast. | 1.3 | 6.4 | |
low_latency | Please confirm your appointment by replying to this message before Friday afternoon. | 1.2 | 4.64 | |
low_latency | Artificial intelligence is changing how we write, code, and communicate with each other every day. | 1 | 5.92 | |
low_latency | One by one, the campfires were extinguished, and the oasis fell as quiet as the desert. | 0.9 | 5.28 | |
default | Hello! Welcome to VoxCPM2-Turbo, a fast text-to-speech engine that can serve hundreds of people at the same time. | 16.9 | 7.04 | |
default | The weather forecast predicts sunshine for most of the weekend, with a light breeze along the coast. | 16.7 | 3.68 | |
default | Please confirm your appointment by replying to this message before Friday afternoon. | 16.6 | 4.16 | |
default | Artificial intelligence is changing how we write, code, and communicate with each other every day. | 16.5 | 5.44 | |
default | One by one, the campfires were extinguished, and the oasis fell as quiet as the desert. | 16.4 | 4.64 |
VoxCPM2-Turbo samples
Five English sentences generated with VoxCPM2 through VoxCPM2-Turbo, once with the low-latency path and once with the default mode, for listening. 48 kHz mono, 16-bit WAV.
- Low-latency path: CASC
ultrasampler, early prefill (K = 1), position-0 KV cache, first-patch memo filled for the whole vocabulary with cached first chunks, deadline-aware decode. - Default: the original VoxCPM2 algorithm (10 diffusion steps, CFG 2.0) with INT8 math.
- In each mode the 5 requests were sent at the same moment, on 1× NVIDIA A10.
- No voice prompt was given, so the model picks a voice for every request: the two versions of a sentence can sound like different speakers.
- With the low-latency path the first 160 ms chunk is mostly silence.
All 10 files were transcribed with Whisper large-v3; every transcript matches its sentence.
| # | Text | Low-latency | TTFA | Length | Default | TTFA | Length |
|---|---|---|---|---|---|---|---|
| 1 | Hello! Welcome to VoxCPM2-Turbo, a fast text-to-speech engine that can serve hundreds of people at the same time. | low_latency/sample_1.wav | 1.5 ms | 7.04 s | default/sample_1.wav | 16.9 ms | 7.04 s |
| 2 | The weather forecast predicts sunshine for most of the weekend, with a light breeze along the coast. | low_latency/sample_2.wav | 1.3 ms | 6.4 s | default/sample_2.wav | 16.7 ms | 3.68 s |
| 3 | Please confirm your appointment by replying to this message before Friday afternoon. | low_latency/sample_3.wav | 1.2 ms | 4.64 s | default/sample_3.wav | 16.6 ms | 4.16 s |
| 4 | Artificial intelligence is changing how we write, code, and communicate with each other every day. | low_latency/sample_4.wav | 1.0 ms | 5.92 s | default/sample_4.wav | 16.5 ms | 5.44 s |
| 5 | One by one, the campfires were extinguished, and the oasis fell as quiet as the desert. | low_latency/sample_5.wav | 0.9 ms | 5.28 s | default/sample_5.wav | 16.4 ms | 4.64 s |
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