Nakamichi FOSKA3DA Digital Sound Processor
User Manual
Product Overview
The Nakamichi FOSKA3DA is a Digital Sound Processor designed to enhance your car audio experience. It offers advanced audio processing capabilities, versatile connectivity options, and intuitive control via mobile app and PC software.
Product Features
- High-resolution audio processing
- Digital Sound Processor (DSP) capabilities
- Multiple input and output options
- Control via dedicated mobile application
- Control via PC tuning software
- Support for various audio sources including USB, Bluetooth, and external devices
Product List
The package typically includes:
- Main Unit (FOSKA3DA)
- USB Cable
- Power Cable
- User Manual
Characteristics
The FOSKA3DA provides advanced audio tuning and playback features, including:
- High-fidelity digital audio transmission
- Hard decoding for lossless audio quality
- Support for APTX HD and LDAC high-definition Bluetooth lossless music via external device (FDS05B)
- Comprehensive EQ, crossover, phase, and delay adjustments
- Main volume and subwoofer volume control
- Output channel settings and gain adjustments
System Wiring Diagram
This section details the connections for the FOSKA3DA. It illustrates how to connect power, speakers, and various audio sources. Key connection points include power input, speaker outputs, and input terminals for USB, auxiliary, and other sources. The diagram shows the flow of audio signals and power distribution within the system.
Precautions
Please observe the following precautions for safe and optimal operation:
- Do not disassemble the unit.
- Avoid exposure to water or moisture.
- Avoid operating in excessively high temperatures.
- Professional installation is recommended for optimal performance and safety.
- Ensure proper power connections.
Audio Playback Modes
USB Playback
Connect a USB flash drive to the unit for direct music playback. The DSP automatically switches to USB playback when a drive is inserted. Users can navigate to the player interface via the mobile app or PC software to control playback.
Mobile Phone OTG Music Playback
Utilize the OTG (On-The-Go) function to transmit mobile phone music to the DSP in high-fidelity digital format. This allows the DSP to perform hard decoding for lossless audio quality. A mobile phone OTG cable is required. Select [OTG] as the audio source within the mobile app.
Bluetooth Music Playback
Pair your mobile phone via Bluetooth to stream music wirelessly. First-time use requires pairing: turn on Bluetooth on your phone, search for "FDSK630A", and select it to pair. Once paired, the DSP will automatically switch to Bluetooth mode when playing music. Alternatively, select [Bluetooth/Devices] from the audio source menu.
External Device Playback (via FDS05B)
Connect the FDS05B accessory to the EXTERNAL DEVICE port. Enable Bluetooth on your mobile phone and search for "FDS05B" to pair. The FDS05B supports Qualcomm Bluetooth chip with APTX HD and LDAC high-definition Bluetooth lossless music. Note that when the FDS05B is connected, the original unit's built-in Bluetooth music playback will be disabled.
Mobile Phone App Operation
The Nakamichi mobile app provides comprehensive control over the FOSKA3DA. Key functions include:
- Main Interface: Displays connection status (e.g., Bluetooth connected) and allows selection of the main audio source.
- Audio Source Selection: Choose between USB, OTG, Bluetooth, and other available sources.
- Tuning Controls: Adjust main volume, subwoofer volume, treble, bass, mid-range, and channel gain.
- Output Channel Settings: Configure speaker types, phase, and gain for each channel.
- EQ Settings: Fine-tune audio with high and low pass filters, slopes, Q value adjustments, and EQ curve modifications.
- Delay Settings: Adjust audio delay for each channel in milliseconds (ms), centimeters (cm), or inches (inch).
- Mixing Interface: Configure audio mixing between different sources.
- Preset Management: Save and load tuning presets.
- Other Functions: Mute, volume adjustments, and potentially firmware updates.
The app interface displays various controls such as volume sliders, EQ bands, and selection menus for different parameters.
PC Tuning Software
The FOSKA3DA can also be controlled and tuned using dedicated PC software for more advanced adjustments.
PC Tuning Software Download
Solution 1 (Mobile Download): Scan a QR code provided in the manual or on the Nakamichi website to access the download page. Select the FDSK series and choose PC download. Transfer the downloaded file to your computer.
Solution 2 (PC Download): Visit the official Nakamichi car audio website (nakamichicaraudio.com). Navigate to ENQUIRIES > Downloads > DSP Software Download. Select the FDSK series and download the PC software.
PC Tuning Software Installation
Double-click the downloaded executable file (e.g., PC-FDSK.exe) and follow the on-screen prompts to complete the installation. It is recommended to turn off anti-virus software during download and installation. After installation, connect the PC to the DSP using a tuning data cable.
Basic Operations of Computer Tuning
The PC software offers functions such as:
- Restore Factory Settings: Resets all configurations to default values.
- Firmware Upgrade: Update the device's firmware.
- Password Management: Set or modify a password for access.
- Preset Saving/Loading: Save current tuning settings or load previously saved configurations.
- Language Selection: Options may include English, Simplified Chinese, and Traditional Chinese.
- Quick Tuning: Access pre-defined tuning profiles.
Installation Precautions: Disable anti-virus software during download/installation. Use a high-quality tuning data cable for connection.
Computer Tuning Operation
The PC software provides detailed control over all aspects of the DSP:
- Channel Configuration: Clear output settings, restore factory settings for channels.
- Mixing Interface: Select and adjust mixing ratios for different audio sources.
- Delayed Interface: Set audio delay for each channel with options for units (ms, cm, inch).
- EQ Adjustment: Detailed EQ band adjustments, curve display, high/low pass filter settings (frequency, slope, type - Butterworth, Bessel, Link-Ril), Q value adjustment.
- Gain Adjustment: Set channel gain from -12dB to +12dB.
- Phase Setting: Adjust the phase of audio signals.
- Noise Gate Setting: Control the noise gate to reduce unwanted noise.
- Startup Delay Setting: Manage startup delays.
- Volume Control: Adjust main volume, player volume, Bluetooth volume, optical fiber volume.
- Mute Functions: Mute audio, mute when reversing, or set volume reduction levels (1/4, 1/3, 1/2) when reversing.
- Preset Management: Save/load individual channel presets or all settings.
Joint Debugging: Allows grouping of channels for simultaneous adjustment.
Simple Fault Handling
This section addresses common issues and their potential solutions:
| Symptom / Issue | Possible Cause | Solution |
|---|---|---|
| No electricity | Fuse blown; Incorrect ACC/HOST startup selection; Poor power cord contact | Replace fuse; Connect ACC cable or high-level input correctly; Reconnect power cord |
| APP cannot be installed | APK file not unzipped; Installation process denied permissions | Unzip APK file; Reinstall APK and grant necessary permissions (location, access) |
| APP unable to search for DSP's Bluetooth | Bluetooth not connected/disconnected; Bluetooth isolated by metal; Bluetooth antenna issue | Reconnect Bluetooth; Relocate device away from metal or change installation position; Install/check Bluetooth antenna |
| Computer cannot connect to internet or tuning disconnects | Poor USB contact; Software bug; Old system; Poor quality data cable; System compatibility issues | Replace USB port; Reinstall software; Update system/use Windows 7+; Use high-quality data cable; Use Windows computer |
| USB playback sound becomes silent or intermittent | Software problem; USB drive issue | Close/reopen software; Replace USB drive or port |
| Bluetooth music cannot play | Bluetooth not connected or disconnected | Reconnect Bluetooth |
| Bluetooth music is intermittent or silent at distance | Bluetooth interference; Poor antenna connection | Relocate device; Check/install antenna |
| High bottom noise | RCA line interference; Main unit noise; High-level input mismatch | Replace RCA wire; Adjust noise gate or replace main unit; Set high-level input gain |
| Optical fiber sound too soft or intermittent | Low output amplitude of optical fiber | Replace with high/low level input to DSP amplifiers |
| Some channels have no sound | Channels deleted/isolated by antivirus software; High-level input wattage mismatch | Check antivirus settings; Adjust high-level input gain |
