Mixer bluetooth -- 2

€250-750 EUR

Cancelled

Posted about 6 years ago

€250-750 EUR

Paid on delivery

What we have: 5 microphones (or line-input) (3.5' male jack connection) (or more for next release) 2 stereo speakers (3.5' male jack connection) (or more for next release) Bluetooth device ready to communicate by app. (Take as reference a typical mobile phone with an Android version greater than 5.1 (Lollipop) install on it) What we need: 1. Record sound from microphones and play it by Speakers in a "live" situation ( = very low latency system). 2. Apply some effects to microphones in terms of GAIN and Frequency on each channel input/output a. WARNING: Gain could be also negative (reverse wave) in order to create a special sound effect. b. On frequency, in octave band, we need to put (typical) filter like low pass band or high pass band, band equalizer …etc… 3. Play by Speakers the mixed sound with these possibilities: a. Speaker 1 or 2 could play a combination of sound among the 5 MICs (so we can play MIC 1 and MIC 2 or all MICs or 3 of them and so on) independently. This meaning that we can also play MIC1 and MIC2 on Speaker 1 and MIC3 and MIC5 on Speaker 2 while MIC 4 is off, for example. b. On each Speaker we can apply a sum of effects like to microphone. These effects can be set differently on each speaker. 4. All these settings are digital, so we need to record the sound, apply effects and choose what is played and what is not by Bluetooth interface in live mode. Final release of electronic board need also to have: 1. Bluetooth communication on board (as wireless monitor and firmware upgrading). 2. COM port by mini USB female connection (as wired monitor and firmware upgrading). 3. I2C communication port using a RJ45 connector (following the specifications in a document apart) for compatibility to another system. 4. At least n°5 3.5' Jack female connection for the microphones (or more for next release). 5. At least n°2 3.5' Jack female connection for the speakers (or more for next release). 6. 1 connector for 230V power supply. Minimal constrain: 1. No interference (noise) between the power supply and the sound play by speakers or recorded by microphones. (= EMC compatibility) 2. No interference (noise) between Bluetooth and the sound play by speakers or recorded by microphones. (= EMC compatibility) 3. CPU clock frequency MUST BE FAST enough to avoid problems on latency. DSP system with same constrains is needed also. 4. An SD card used to record sound could be take in consideration but need to be a fast record type. Is up to you define a list of tecs specs of microphone and speaker compatible with hardware you are design.

Electronic Design

Microcontroller

PCB Design and Layout

Project ID: 24398557

About the project

7 proposals

Remote project

Active 6 yrs ago

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7 freelancers are bidding on average €591 EUR for this job

@hayat38402

We are a team of Electrical and Electronics engineers and we are Excellent in the following areas: • Embedded C Programming. • VHDL/Verilog, LABView • Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC and STM32. • IDEs like Keil MDK V5, ATmel studio and MPLab XC8. • PLCs / SCADA • PCB Designing-Proteus, Eagle. • Multisim • IOT Technologies like Ethernet, GSM GPRS. • HTTP Restful APIs connection for IOT Communications. Also we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements. We can deliver your project efficiently at a time. If you choose me, I think you won't regret. Best Regards. Also we have good command over REPORT WRITING, We can show you many samples of our previous reports. We can discuss further details in the message box.

€500 EUR in 7 days

4.9

(6 reviews)

4.7

@umartechboy

Instd of a mic-bt-cpu-bt-spkr chain, i think you should go with a mostly analog and partly embedded controller that procrsses mic data, outputs on spkrs, takes only coms from the app/i2c. What u say? Relevant Skills and Experience I'm adept in embedded and analog circuits and firmwares. Ive done a state of the art analog data acquisition and synthesis system of 80kHz on stm32, and a 25Mhz FPGA signal synthesizer with 1Hz LC.

€888 EUR in 25 days

5.0

(1 review)

4.4

@shubhankert

Sir, I have read your requirements and would like to inform you that I and my team can easily handle your task also we have some sample projects to showcase our previous projects. We do not charge anything until giving you some successful results, no token money will be asked from our side. We guarantee you the best quality of work and timely service.

€500 EUR in 7 days

4.8

(16 reviews)

3.2

@writiqueproject

As an electronic architect, I have been working in PCB structure/design and firmware programming field for 8+ years. Here is a portion of the encounters that I worked back. - Schematic and PCB Format is utilizing Altium Planner, Rhythm, Falcon, etc. ISE/XPS/SDK/Vivado, Altera Quartus, IceCube) - ARM, DSP, MCUs, Arduino experience. - Arm centers: ATSAM, STM32, PIC32, A13, Freescale, MSP, NXP - MPU: Pic16F, Pic18F, Pic33F, Atmega8,16,128,32,8051,8951,8052,80251 - Single board PC: Raspberry Pi, Beaglebone, NanoPi - Strong with UART, I2C, SPI, BLE, BT, GSM/GPRS/GPS, xBee, ZigBee. - Especially full understanding for BLE HM10, HC05, ESP32, DA14580, nRF52832, 52840, BlueNRG, - C/C++ Coding IDE: keil uvision, Eclipse IDE, Arduino IDE, Avr Studio. - Microprocessor / Microcontrollers: 8051, 8086, ATMEGA, AVR, ATSAM3X8E,STM32,PIC Open Source Micro controllers Platforms: Arduino Uno, Arduino Nano, Arduino Due, STM32 Nucleo board. Experience in managing all phases of electronic product manufacturing and assembly Experience in board-level Testing, Debugging, Test Reports, Test Plans. I am ready to give hardworking, reliability, flexibility & honesty. I can work with minimal supervision, communicate & give updates on the status of my work output. When you employ me, anticipated that I should enable your business to like I 'm developing it as my own. I couldn't imagine anything better than to get notification from you

€250 EUR in 2 days

4.8

(5 reviews)

3.0

@efedriko1234

Hi . Honesty, reliability and professionalism. This is what we can offer. We worked pevously on Electronic Design, PCB Design and Layout and Microcontroller projects You project title gives us the impression of what you are after " Mixer bluetooth -- 2 " but it would be much appreciated if we discuss further. We have some questions in regards your project description bellow " What we have: 5 microphones (or line-input) (3 "

€1,000 EUR in 12 days

0.0

(0 reviews)

0.0

@kumarineetu072

I am hardworking person. I can work for 8 hours . I am obedient and punctual. this project is made for me .

€500 EUR in 7 days

0.0

(0 reviews)

0.0

@gsa5b06f37877085

Hello, I am an electronic engineer and electromechanical technical. I have more than 6 years of experience in electronic design of hardware and software. I have been working with sound for more than 10 years and I know the needs that one seeks to satisfy with an audio mixer.. If you want to know something else, do not hesitate to contact me I am already at your disposal. Best regards Guillermo

€500 EUR in 7 days