5Tooth

5Tooth is an exceptional foundation for a high-fidelity music streamer and sound optimization system, specifically demonstrated in a Five-Band Bluetooth Equalizer with Real-Time Display application. At its heart lies the Texas Instruments PCM5102 stereo Digital-to-Analog Converter (DAC), engineered to extract pristine audio quality from digital sources.

Overview: The Precision Digital Audio Solution

This product serves as a premium link between your digital music source and your analog audio equipment, utilizing the latest generation of advanced segment-DAC architecture to deliver powerful and nuanced sound. The DAC outputs a 2.1 Vrms ground-centered signal, which brilliantly allows audiophiles to eliminate traditional DC blocking capacitors, resulting in a cleaner, more direct signal path.

For the demanding listener, the system supports hardware control and handles PCM audio data format at 16 bits 44.1 KHz sample rate (Bluetooth standard} stereo. The inclusion of an integrated Phase-Locked Loop (PLL) eliminates the need for an external, high-frequency system clock, reducing system electromagnetic interference (EMI) and simplifying the audio signal integrity.

Engineered for Audiophile Standards

The PCM5102 component is designed with performance metrics that elevate your listening experience:

• Purity of Sound: The DAC boasts a robust 112 dB Dynamic Range and Signal-to-Noise Ratio (SNR).
• Minimal Distortion: Total Harmonic Distortion plus Noise (THD+N) is exceptionally low at –93 dB at -1 dBFS.
• Ultra-Low Noise Floor: It features Market-Leading Low Out-of-Band Noise, offering up to 20 dB lower noise compared to older DAC technologies, effectively combating EMI and aliasing in downstream amplification.

How to Use the System

The product functions as a sophisticated audio processor and streamer, controllable via tactile feedback and an elegant graphical interface showing your custom equalization curve.

1. Connecting to the Source (Streaming): The system acts as a Bluetooth A2DP Sink, allowing you to stream audio wirelessly from your smart device or computer. The default device name is typically set to "5Tooth".

2. Navigation and Control: The system uses a simple navigation structure relying on four controls (UP, DOWN, LEFT, RIGHT). The button are capacitive. Just connect to a conductive surface to achieve operation.

• Screen Navigation: Use the LEFT and RIGHT buttons to cycle through the available screens, which include the Home screen (showing streaming status), Attenuation control, and individual adjustment screens for each of the five filters.
• Parameter Adjustment: Use the UP and DOWN buttons to modify the selected parameter on the current screen.

3. Sound Optimization (Equalization): The product features a powerful Five-Band Digital Equalizer that offers precise control over your sonic signature.

• Filter Types: The system supports professional filter types, including Low Shelf, High Shelf, and three configurable Peaking filters across the frequency spectrum.
• Adjustable Parameters: You can fine-tune each of the five filters by adjusting three key parameters:
  • Gain: Modify the output level of the filter in 0.5 dB steps.
  • Frequency (Freq): Adjust the center or turnover frequency of the filter.
  • Q (Quality Factor): Control the bandwidth or sharpness of the filter (adjustable in 0.1 increments).
• Global Level Control: A separate Attenuation screen allows you to set the overall output level from 1.0 down to 0.0 in 0.05 increments.

4. Real-Time Visual Feedback: As you adjust the settings, the dedicated display instantly draws the filter response graph across the full width of the screen, dynamically illustrating the cumulative effect of your EQ changes from 20 Hz to 20,000 Hz. This graphical representation ensures you maintain full command over your audio profile.

5. Implementation of buttons is left to the builder. The kit is designed to work with 1 1/2 inch wide by 1/4 inch thick hobby wood plank. A drill pattern is provided to help create buttons from wire.