This model is fine tuned on the IEMOCAP dataset. We applied volume normalization and data augmentation (noise injection, pitch shift and audio stretching). Also, this is a speaker independent model: We use Ses05F in the IEMOCAP dataset as validation speaker and Ses05M as test speaker. 

The initial pre-trained model is **facebook/wav2vec2-base**. The fine tune dataset only contains 4 common emotions of IEMOCAP (happy, angry, sad, neutral), *without frustration*. The audios are either padded or trimed to 8-sec-long before fine tuning. 

After **10** epoches of training, the validation accuracy is around **67%**.

In order to impliment this model: Please run the following code in a python script:

```
from transformers import AutoFeatureExtractor, AutoModelForAudioClassification
import librosa
import torch

target_sampling_rate = 16000
model_name = 'canlinzhang/wav2vec2_speech_emotion_recognition_trained_on_IEMOCAP'
audio_path = your_audio_path

#build id and label dicts    
id2label = {0:'neu', 1:'ang', 2:'sad', 3:'hap'}
label2id = {'neu':0, 'ang':1, 'sad':2, 'hap':3}

feature_extractor = AutoFeatureExtractor.from_pretrained(model_name)

model = AutoModelForAudioClassification.from_pretrained(model_name)

y_ini, sr_ini = librosa.load(audio_path, sr=target_sampling_rate)

inputs = feature_extractor(y_ini, sampling_rate=target_sampling_rate, return_tensors="pt")

logits = model(**inputs).logits

predicted_class_ids = torch.argmax(logits).item()

pred_class = id2label[predicted_class_ids]

print(pred_class)
```