Model reference · open weights

wav2vec2-da-ft-nst

Audio Alvenir Speech→text 1 build Open weights 1k dl/mo

wav2vec2-da-ft-nst is an open-weight audio or speech model from Alvenir. wav2vec2-base-da-ft-nst (BF16) weighs 378 MB; the smallest configuration that runs it is RTX 3060 12 GB.

For self-hosting, compare this build's requirements below with the GPU you plan to rent.

  • wav2vec2-da-ft-nst is an automatic speech recognition model for Danish developed by Alvenir.
  • It is a fine-tuned version of the wav2vec2-base-da model trained on the public NST dataset and requires 16kHz audio input.
  • The model is licensed under Apache-2.0 and was trained using fairseq before being converted to the huggingface/transformers format.

Summary of the Alvenir/wav2vec2-base-da-ft-nst model card, 2026-10-01

What it is

Released byAlvenir
Released2022-03-15
VRAM378 MB for the weights

What it runs on

Memory and cards for wav2vec2-base-da-ft-nst (BF16)

378 MBweights, file size
1.6 GBruntime overhead
CardOne streamMemory
RTX 3060 12 GBfits11.6 GB
RTX 4060 Ti 16 GBfits15.4 GB
RTX 3090 24 GBfits23.4 GB
RTX 4090 24 GBfits23.4 GB
RTX 5090 32 GBfits31.0 GB
L40S 48 GBfits44.0 GB
A100 80 GBfits78.2 GB
H100 80 GBfits78.1 GB
RTX PRO 6000 Blackwell 96 GBfits93.8 GB
DGX Spark (GB10) 128 GB unifiedfits107 GB
H200 141 GBfits138 GB
B200 180 GBfits176 GB

From the model card

What Alvenir says about wav2vec2-da-ft-nst

Read the model card

This the alvenir wav2vec2 model for Danish ASR finetuned by Alvenir on the public NST dataset. The model is trained on 16kHz, so make sure your data is the same sample rate.

The model was trained using fairseq and then converted to huggingface/transformers format.

Alvenir is always happy to help with your own open-source ASR projects, customized domain specializations or premium models. ;-)

Usage

import soundfile as sf
import torch

from transformers import Wav2Vec2CTCTokenizer, Wav2Vec2Tokenizer, Wav2Vec2Processor, \
    Wav2Vec2ForCTC

def get_tokenizer(model_path: str) -> Wav2Vec2CTCTokenizer:
    return Wav2Vec2Tokenizer.from_pretrained(model_path)

def get_processor(model_path: str) -> Wav2Vec2Processor:
    return Wav2Vec2Processor.from_pretrained(model_path)

def load_model(model_path: str) -> Wav2Vec2ForCTC:
    return Wav2Vec2ForCTC.from_pretrained(model_path)

model_id = "Alvenir/wav2vec2-base-da-ft-nst"

model = load_model(model_id)
model.eval()
tokenizer = get_tokenizer(model_id)
processor = get_processor(model_id)

audio_file = ""

audio, _ = sf.read(audio_file)

input_values = processor(audio, return_tensors="pt", padding="longest", sampling_rate=16_000).input_values
with torch.no_grad():
    logits = model(input_values).logits

predicted_ids = torch.argmax(logits, dim=-1)
transcription = processor.batch_decode(predicted_ids)
print(transcription)

Benchmark results

This is some benchmark results on the public available datasets in Danish.

DatasetWER GreedyWER with 3-gram Language Model
NST test15,8%11.9%
alvenir-asr-da-eval19.0%12.1%
common_voice_80 da test26,3%19,2%

Quoted from the model card on Hugging Face. The full card is behind the Hugging Face link above.

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