A more professional wireless metronome solution

The market is becoming increasingly saturated, product prices are falling, and insufficient R&D capabilities have led to serious homogeneity and lack of product characteristics. This has prompted us to think about what else Bluetooth can do, how to stand out from the crowd, get rid of ineffective efforts, and maximize product value.

After summarizing and analyzing the products, we found that the current products basically remain at the reference design level, listing parameters, and failing to fully tap the potential of the chip, resulting in performance waste. Differentiated applications, digging deep into the potential of chips, make products that others do not have, and better than others.

This solution is to switch to another track by innovating on mature platforms through software empowerment. Successfully use existing audio experience to conquer another group of customers. The solution adopts Qualcomm's current main QCC3040 platform, giving full play to the characteristics of fast development cycle, sufficient market inventory, and great cost advantage brought by mature platforms.

Metronomes are widely used in sports and music. It plays a very important role in speed and rhythm control. Enabling innovation based on Bluetooth headsets to achieve more advantages than traditional metronome products.

Compared with traditional solutions, it has the following advantages:

• Professional sound quality experience

Audio chip platform, professional tuning, stereo output with clear and high recognition rate.

• Professional-grade comfortable wearing

Headphones are designed with professional fit and can be customized in multiple styles: in-ear, head-mounted, and neck-mounted.

• Professional-grade timing accuracy

The high-performance processor brings subtle timing accuracy, and the beats are accurate to the second.

• Professional noise reduction monitoring

Built-in professional DSP algorithm, all noise reduction monitoring functions are available. It can filter echoes in a closed environment without interference, and monitor the surroundings in an open environment without missing anything.

• Dual-mode for both training and entertainment

Switch between beat/headphone mode with one button. Beat the beat during training and connect to your phone in your spare time. It is a multi-functional device that is easy to carry.

Knowledge base involved in the solution

• Mode switching;

• Preset beat parameters;

• Preset Tone sound;

The above functions are implemented with the help of custom pskey. One key saves the startup mode, one key saves different beat speeds, and several groups of keys are selected to save different Tone sound effects.

Advanced Solution

Reserved for improvement

1 Accompaniment music and beat mixed output;

2. Customize sound effects;

3. Screen display function;

4. Platform upgrade to QCC3071, use BLE Audio networking function

► Display board photos

►Solution Block Diagram

►Core technology advantages

1. Competitive price;
2. Dual-channel stereo output, suitable for TWS earphones and sports and headphone products;
3. Support Qualcomm® aptX and aptX HD Audio, as well as Adaptive aptX, aptX Voice;
4. Integrated Qualcomm third-generation ANC noise reduction function, multiple modes can be freely combined;
5. Greater transmission power can increase Bluetooth distance, the maximum transmission power can reach 13dBm;

►Solution Specifications

1. Built-in 64Mbit Flash;
2. Built-in 32 bit Kalimba DSP X 2;
3. Support BT5.2 and 2Mbps BLE;
4. Built-in charging circuit with a maximum charging current of 200mA;
5. Built-in PMU management unit to save external devices; 6. Support UART, I2C/SPI, USB 2.0 interface;
6. Support Class AB and Class D output;
7. ADC sampling supports up to 96KHz, DAC sampling rate supports up to 384KHz;
8. 5.6mm x 5.9mm x 1.0mm 90ball 0.5 mm pitch VFGBA package