[DOCUMENTATION] Refactored the readme file and added common cuDNN library issues

Author: patterns-complexity

docs/QA.md

@@ -37,3 +37,36 @@ When calling `get_vad_segments` from `se_extractor.py`, there should be a messag
 Downloading: "https://github.com/snakers4/silero-vad/zipball/master" to /home/user/.cache/torch/hub/master.zip
 ```
 The download would fail if your machine can not access github. Please download the zip from "https://github.com/snakers4/silero-vad/zipball/master" manually and unzip it to `/home/user/.cache/torch/hub/snakers4_silero-vad_master`. You can also see [this issue](https://github.com/myshell-ai/OpenVoice/issues/57) for solutions for other versions of silero.
+
+## Missing `cuDNN` libraries
+#### Missing `cuDNN` libraries can be downloaded from the url below (requires login but you can just create a new account):
+
+[https://developer.nvidia.com/rdp/cudnn-archive](https://developer.nvidia.com/rdp/cudnn-archive)
+
+At the time of writing the required version of `cuDNN` for OpenVoice is `8.x` for `CUDA 11.x`.
+
+#### Extracting the `cuDNN` libraries:
+```bash
+tar -xvf <path_to_downloaded_cuDNN_archive>
+```
+
+Your `cuDNN` libraries will be in the `bin` directory of the extracted archive.
+
+## My system can't find downloaded `cuDNN` libraries
+
+If you already know the path to the required `cuDNN` libraries, you can set the `LD_LIBRARY_PATH` environment variable to that path. You can do this by running the following commands:
+  
+Check if the `LD_LIBRARY_PATH` environment variable is set.
+```bash
+echo $LD_LIBRARY_PATH
+```
+
+- #### If it's empty:
+  ```bash
+  export LD_LIBRARY_PATH=<path_to_cuDNN_libraries>
+  ```
+
+- #### Otherwise:
+  ```bash
+  export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:<path_to_cuDNN_libraries>
+  ```

docs/USAGE.md

@@ -3,9 +3,9 @@
 ## Table of Content
 
 - [Quick Use](#quick-use): directly use OpenVoice without installation.
-- [Linux Install](#linux-install): for researchers and developers only.
-    - [V1](#openvoice-v1)
-    - [V2](#openvoice-v2)
+- [Minimal Demo](#minimal-demo): for users who want to quickly try OpenVoice.
+- [Linux Install](#linux-install-for-both-v1-and-v2): installation guide for developers and researchers on Linux.
+- [Example Usage](#example-usage): example usage of OpenVoice V1 and V2.
 - [Install on Other Platforms](#install-on-other-platforms): unofficial installation guide contributed by the community
 
 ## Quick Use
@@ -32,23 +32,67 @@ For users who want to quickly try OpenVoice and do not require high quality or s
     <a href="https://huggingface.co/spaces/myshell-ai/OpenVoice"><img src="../resources/huggingface.png" height="32"></a>
 </div>
 
-## Linux Install
+## Linux Install (for both V1 and V2)
 
-This section is only for developers and researchers who are familiar with Linux, Python and PyTorch. Clone this repo, and run
+This section is only for developers and researchers who are familiar with Linux, Python and PyTorch.
 
-```
-conda create -n openvoice python=3.9
-conda activate openvoice
+### 1. Create a virtual environment:
+
+- #### If you're using Conda
+  ```bash
+  conda create -n openvoice python=3.9
+  conda activate openvoice
+  ```
+
+- #### If you're using Virtualenv
+  ```bash
+  python3 -m venv <your_venv_name>
+  source <your_venv_name>/bin/activate
+  ```
+
+### 2. Clone the OpenVoice repository and enter the newly created directory:
+```bash
 git clone git@github.com:myshell-ai/OpenVoice.git
 cd OpenVoice
+```
+
+### 3. Install in editable mode:
+```bash
 pip install -e .
 ```
 
-No matter if you are using V1 or V2, the above installation is the same.
+### 4. Install project dependencies:
+```bash
+pip install -r requirements.txt
+```
 
-### OpenVoice V1
+### 5. Download the appropriate model checkpoint:
+
+- #### OpenVoice V1:
+  Download the checkpoint from [here](https://myshell-public-repo-hosting.s3.amazonaws.com/openvoice/checkpoints_1226.zip) and extract it to the `checkpoints` folder.
+
+- #### OpenVoice V2:
+  Download the checkpoint from [here](https://myshell-public-repo-hosting.s3.amazonaws.com/openvoice/checkpoints_v2_0417.zip) and extract it to the `checkpoints_v2` folder.
+
+### 6. (OpenVoice V2 only) Install [MeloTTS](https://github.com/myshell-ai/MeloTTS):
+```
+pip install git+https://github.com/myshell-ai/MeloTTS.git
+python -m unidic download
+```
 
-Download the checkpoint from [here](https://myshell-public-repo-hosting.s3.amazonaws.com/openvoice/checkpoints_1226.zip) and extract it to the `checkpoints` folder.
+### 7. (GPU) Running OpenVoice on GPU:
+
+If you're seeing an error about missing `libcudnn_ops_infer.so.8` (or similar) when you run OpenVoice, that means you do not have all the necessary `cuDNN` libraries installed, or they have been placed in a directory that is not in your `LD_LIBRARY_PATH` environment variable.
+
+To fix this problem see:
+
+[Common Issues - Missing `cuDNN` libraries](QA.md#missing-cudnn-libraries)
+
+[Common Issues - My system can't find downloaded `cuDNN` libraries](QA.md#my-system-cant-find-downloaded-cudnn-libraries)
+
+## Example Usage
+
+### OpenVoice V1
 
 **1. Flexible Voice Style Control.**
 Please see [`demo_part1.ipynb`](../demo_part1.ipynb) for an example usage of how OpenVoice enables flexible style control over the cloned voice.
@@ -60,16 +104,7 @@ Please see [`demo_part2.ipynb`](../demo_part2.ipynb) for an example for language
 
 ### OpenVoice V2
 
-Download the checkpoint from [here](https://myshell-public-repo-hosting.s3.amazonaws.com/openvoice/checkpoints_v2_0417.zip) and extract it to the `checkpoints_v2` folder.
-
-Install [MeloTTS](https://github.com/myshell-ai/MeloTTS):
-```
-pip install git+https://github.com/myshell-ai/MeloTTS.git
-python -m unidic download
-```
-
-**Demo Usage.** Please see [`demo_part3.ipynb`](../demo_part3.ipynb) for example usage of OpenVoice V2. Now it natively supports English, Spanish, French, Chinese, Japanese and Korean.
-
+**1. Demo usage of V2.** Please see [`demo_part3.ipynb`](../demo_part3.ipynb) for example usage of OpenVoice V2. Now it natively supports English, Spanish, French, Chinese, Japanese and Korean.
 
 ## Install on Other Platforms
 
@@ -81,3 +116,6 @@ This section provides the unofficial installation guides by open-source contribu
 - Docker
   - [Guide](https://github.com/StevenJSCF/OpenVoice/blob/update-docs/docs/DF_USAGE.md) by [@StevenJSCF](https://github.com/StevenJSCF)
   - You are welcome to contribute if you have a better installation guide. We will list you here.
+
+## Common Issues
+See [common issues](QA.md) for common issues and solutions.