Creating a complete user guide for SoX involves covering a range of basic use cases to help you get started with this versatile audio processing tool. SoX is highly effective for tasks like format conversion, audio effects application, and general sound manipulation, making it a go-to utility for both beginners and advanced users comfortable with the command line.

### Installation

First, ensure SoX is installed on your system. It's available in most Linux distributions' package repositories.

For Debian-based systems (like Ubuntu), use:
```bash
sudo apt-get install sox
```

For Red Hat-based systems, use:
```bash
sudo yum install sox
```

### Basic Operations

#### 1. Converting Audio Formats
SoX can convert audio files between various formats. For example, to convert an MP3 file to a WAV file:
```bash
sox input.mp3 output.wav
```

#### 2. Playing Audio Files
SoX can play audio files directly from the command line:
```bash
play filename.mp3
```

#### 3. Recording Audio
To record audio with SoX, use the `rec` command. This example records a 5-second audio clip from the default recording device:
```bash
rec -d 5 myrecording.wav
```

### Applying Effects

#### 1. Changing Volume
To increase or decrease the volume of an audio file, use the `vol` effect:
```bash
sox input.mp3 output.mp3 vol 2dB
```

#### 2. Applying Reverb
Add reverb to an audio file with:
```bash
sox input.wav output.wav reverb
```

#### 3. Trimming Audio
Trim an audio file to only include a specific portion (e.g., start at 10 seconds and end at 20 seconds):
```bash
sox input.mp3 output.mp3 trim 10 10
```

#### 4. Combining Audio Files
Concatenate two or more audio files into one:
```bash
sox input1.mp3 input2.mp3 output.mp3
```

### Advanced Features

#### 1. Applying Multiple Effects
You can chain multiple effects in a single command:
```bash
sox input.mp3 output.mp3 reverb vol 2dB trim 0 30
```

#### 2. Noise Reduction
To reduce noise, first capture a noise profile:
```bash
sox noise-audio.wav -n noiseprof noise.prof
```
Then apply the noise reduction:
```bash
sox input.wav output.wav noisered noise.prof 0.3
```

#### 3. Spectrogram
Generate a spectrogram of an audio file:
```bash
sox input.mp3 -n spectrogram -o output.png
```

### Tips and Tricks

- **Chain Effects**: SoX allows for complex processing chains that combine multiple effects, optimizing the processing flow.
- **Scripting**: Integrate SoX commands into shell scripts for batch processing or automated audio manipulation tasks.
- **Documentation**: For more detailed information on all SoX capabilities and effects, consult the SoX man page or the official SoX documentation by running `man sox` or visiting [SoX - Sound eXchange](http://sox.sourceforge.net/).

SoX is an exceptionally powerful tool for audio processing, offering a wide range of functionality from basic to advanced audio manipulation and analysis. Experimenting with its various options and effects can help you achieve precisely the audio outcomes you need.