Soundcraft Si Impact User Manual: A Comprehensive Guide
This manual details the Soundcraft Si Impact digital mixing console, covering setup, operation, and troubleshooting. It assists users in maximizing the console’s features for professional audio applications.
The Soundcraft Si Impact is a compact, yet powerful, digital mixing console designed for live sound, recording, and broadcast applications. It bridges the gap between traditional analog workflows and modern digital control, offering a familiar tactile experience with the benefits of digital precision and recall.
This console boasts a high channel count, flexible routing capabilities, and integrated DSP effects, making it suitable for a wide range of performance scenarios. The Si Impact’s intuitive layout and responsive control surface allow engineers to quickly navigate and adjust parameters, even in demanding live environments.
Furthermore, the console’s USB connectivity facilitates direct stereo recording and playback, streamlining the recording process. Its robust build quality ensures reliability, while its compact footprint makes it easily transportable. This manual will guide you through every aspect of the Si Impact, from initial setup to advanced features.
Unboxing and Initial Setup
Upon unboxing your Soundcraft Si Impact, carefully inspect all components for any shipping damage. The package should include the console itself, a power cable, a USB cable, and this user manual. Retain the original packaging for potential future transport.
Connect the power cable to the console and a grounded outlet. Before powering on, ensure your speakers or amplification system are connected to the appropriate outputs. Initially, connect a dynamic microphone to one of the XLR microphone inputs. Power on the console and allow it to complete its self-test sequence.

Familiarize yourself with the basic controls – master fader, channel gain, and phantom power switches. A basic sound check with the microphone will confirm proper functionality. Download and install any available firmware updates from the Soundcraft website to ensure optimal performance and access to the latest features.
Understanding the Control Surface Layout
The Soundcraft Si Impact boasts an intuitive control surface designed for efficient workflow. Centrally located are the channel strips, each controlling a single input with dedicated gain, EQ, and dynamics controls. Above these reside the faders, providing precise level control for each channel and output bus.
The master section houses the main output level controls, metering, and monitoring options. A prominent LCD screen displays crucial parameters and allows for menu navigation. To the right, dedicated buttons access scene management, user profiles, and DSP settings.
The rotary encoders offer quick access to frequently used functions, while the layer buttons unlock deeper editing capabilities. Understanding the logical grouping of these controls is key to navigating the console effectively and achieving optimal sound mixing results.

Connectivity and Inputs/Outputs
The Si Impact offers versatile connectivity, including microphone, line, auxiliary, USB, and AES/EBU inputs/outputs. This allows seamless integration with various audio sources and systems.
Microphone Inputs: Types and Gain Staging
The Soundcraft Si Impact features high-quality microphone preamps designed to accommodate a wide range of microphone types – dynamic, condenser, and ribbon. Each channel boasts a dedicated XLR input with phantom power (48V) switchable independently, crucial for condenser microphones. Understanding gain staging is paramount for optimal performance.
Begin by setting the gain trim to a low level and gradually increasing it while the performer is active. Monitor the input level meters carefully, aiming for a healthy signal without clipping (distortion). Proper gain staging minimizes noise and maximizes the signal-to-noise ratio. The Si Impact provides precise control over input gain, allowing you to tailor the signal to each microphone’s characteristics and the source’s dynamic range. Remember to consider the microphone’s sensitivity when adjusting gain.
Utilize the pad switches for high-output microphones to prevent overloading the preamps. Careful attention to these details ensures clean, professional-sounding recordings and live mixes.
Line Inputs: Connecting External Sources
The Soundcraft Si Impact offers versatile line input options for integrating external audio sources like synthesizers, drum machines, and effects processors. These inputs, typically via TRS or XLR connectors, accept balanced or unbalanced signals, providing flexibility in connecting various equipment. Ensure proper impedance matching for optimal signal transfer and minimal noise.
When connecting line-level sources, adjust the input gain carefully to avoid clipping or excessively low signal levels. Utilize the channel trim controls to achieve a healthy signal, monitoring the input meters closely. The Si Impact’s line inputs are designed to handle a wide dynamic range, but careful gain staging remains crucial for achieving a clean and professional sound.
Remember to select the appropriate input source for each channel using the input selection switches; Proper connection and gain staging will ensure seamless integration of external audio sources into your mix.
Auxiliary Sends and Returns: Routing Signals
The Soundcraft Si Impact’s auxiliary sends and returns are powerful tools for creating flexible signal routing options. Aux sends allow you to route a portion of any channel’s signal to external effects units, monitor mixes, or other destinations without affecting the main mix. The Si Impact provides multiple aux sends, each configurable for pre- or post-fader operation.
Post-fader sends are ideal for monitor mixes, as the level sent to the monitors follows the channel fader position. Pre-fader sends are useful for effects processing, ensuring a consistent signal level regardless of fader adjustments. Aux returns then bring the processed signal back into the mix.
Carefully manage aux send levels using the dedicated send controls on each channel. Utilize the aux return channels to blend the processed signal back into the main mix, adjusting levels for a balanced and polished sound. Understanding aux routing unlocks advanced mixing capabilities.
Digital I/O: USB and AES/EBU Connectivity
The Soundcraft Si Impact offers versatile digital connectivity via USB and AES/EBU, expanding its integration capabilities. The USB port facilitates direct stereo recording and playback to a computer, simplifying music production and live streaming workflows. This connection allows for multi-track recording directly into your DAW (Digital Audio Workstation).
AES/EBU provides a professional digital audio interface for connecting to external devices like digital snakes, recording interfaces, or other digital mixing consoles. This ensures high-quality, low-latency audio transfer. The Si Impact supports various sample rates for compatibility with different equipment.
Proper configuration of the digital I/O settings within the console’s menu is crucial for optimal performance. Ensure correct driver installation for USB connectivity and appropriate clocking settings for AES/EBU to avoid audio glitches or dropouts.

Mixing Console Functions
Explore core mixing features: channel strips, fader control, bus routing, and the master section. These elements provide comprehensive control over your audio signal flow.
Channel Strips: EQ, Dynamics, and Effects
Each channel strip on the Soundcraft Si Impact offers extensive signal processing capabilities. The EQ section provides parametric equalization, allowing precise frequency shaping for each channel. Users can sculpt the sound with high and low-pass filters, shelving EQ, and multiple parametric bands.
Dynamics processing includes compression and limiting, essential for controlling dynamic range and achieving a polished sound. These tools help to even out levels and prevent clipping. Furthermore, the Si Impact’s channel strips integrate seamlessly with the console’s effects engine.
Access a range of high-quality effects, including reverb, delay, chorus, and more, directly from each channel. These effects can be tailored to suit various applications, from vocals to instruments. The intuitive interface allows for quick adjustments and creative sound design, enhancing the overall mix quality.
Faders and Automation
The Soundcraft Si Impact features motorized faders providing precise control over channel levels and mix balances. These faders are central to the mixing workflow, allowing for tactile adjustments and real-time control of the audio signal. Automation capabilities enable users to record and recall fader movements, creating dynamic mixes that evolve over time.
Automation data can be stored and recalled with scenes, ensuring consistent performance and simplifying complex setups. This feature is invaluable for live sound reinforcement and broadcast applications where repeatability is crucial. Users can automate individual channels or entire groups, streamlining the mixing process.
The console offers various automation modes, including touch, latch, and write, providing flexibility for different mixing styles. Automation allows for intricate mixes to be recreated flawlessly, saving time and ensuring a professional sound.
Buses and Groups: Creating Submixes
The Soundcraft Si Impact provides a flexible bussing architecture allowing for the creation of multiple submixes, or groups. These groups enable efficient management of complex mixes by consolidating multiple channels into a single control point. This is particularly useful for drums, vocals, or other instrument groupings.
Dedicated stereo and mono buses are available, offering versatility in routing signals; Users can assign channels to specific buses, controlling their overall level and applying processing such as EQ and dynamics to the entire group. This streamlines the mixing process and allows for cohesive sound shaping.

The console supports various bussing configurations, including pre-fader and post-fader sends, offering control over signal flow. Utilizing buses and groups significantly enhances workflow and allows for a more organized and refined mix.
Master Section: Output Control and Monitoring
The Master Section of the Soundcraft Si Impact serves as the central hub for controlling the overall output level and monitoring the final mix. This section provides precise control over the main stereo output, including a master fader for overall level adjustment and dedicated metering for accurate visual feedback.
Comprehensive monitoring options are available, allowing users to connect various monitoring systems, such as studio monitors, headphones, and in-ear monitors. Dedicated outputs and level controls ensure a tailored monitoring experience.
The Master Section also incorporates essential features like talkback functionality for communication with performers, and the ability to insert processing on the main outputs for final polishing. Careful management of this section is crucial for achieving a professional and balanced final mix.

Digital Signal Processing (DSP)
The Si Impact’s DSP engine delivers powerful effects, EQ, and dynamics processing. Users can sculpt sound with reverb, delay, compression, and parametric equalization tools.
Effects Engine: Reverb, Delay, and Modulation
The Soundcraft Si Impact boasts a versatile effects engine, providing a comprehensive suite of processing tools to enhance your audio. This includes a selection of high-quality reverb algorithms, ranging from classic plate and hall emulations to more creative and ambient spaces. Delay options encompass simple repeats to complex multi-tap delays, offering precise control over timing and feedback.
Modulation effects, such as chorus, flanger, and phaser, add depth and movement to signals. Each effect parameter is readily accessible, allowing for quick adjustments and customized sound design. The Si Impact allows for multiple effects to be utilized simultaneously, expanding creative possibilities. Users can easily assign effects to individual channels or buses, tailoring the processing to specific sources. Furthermore, dedicated effect returns provide flexible routing and level control, ensuring a polished and professional mix.
EQ Options: Parametric and Graphic
The Soundcraft Si Impact provides powerful equalization capabilities, featuring both parametric and graphic EQ options for precise tonal shaping. Each channel strip incorporates a fully parametric four-band EQ, allowing detailed control over frequency, gain, and Q (bandwidth). This enables surgical cuts and boosts to address specific sonic issues or enhance desired frequencies.
Additionally, the console offers graphic EQ options on select buses and outputs. These provide a visual representation of the frequency spectrum, facilitating quick and intuitive adjustments; Users can sculpt the overall tonal balance of the mix with ease. The parametric EQ’s sweepable mid-band is particularly useful for identifying and correcting resonant frequencies. Combined, these EQ tools offer a comprehensive solution for achieving a polished and balanced sound, catering to diverse mixing scenarios and sonic preferences.
Dynamics Processing: Compression and Limiting
The Soundcraft Si Impact’s dynamics processing suite provides essential tools for controlling the dynamic range of audio signals. Each channel features a compressor, offering control over threshold, ratio, attack, and release times. This allows users to tame peaks, increase perceived loudness, and add punch to individual instruments or vocals.
Furthermore, a limiter is available to prevent signals from exceeding a specified level, protecting downstream equipment and ensuring a clean, distortion-free output. The compressor’s sidechain input enables ducking effects, useful for creating space in the mix for vocals or other important elements. Careful application of compression and limiting can significantly enhance the clarity and impact of the overall mix, ensuring a professional and polished sound. Mastering the dynamics tools is crucial for achieving a balanced and impactful final product.
Routing and Patchbay Functionality
The Soundcraft Si Impact boasts a flexible routing system, allowing for complex signal paths and creative mixing possibilities. Signals can be routed to various buses, groups, and auxiliary sends with ease, enabling the creation of intricate submixes and effects chains. The console’s digital patchbay provides a visual representation of all available connections, simplifying signal flow management.
Users can easily re-patch inputs to different channels or outputs to different destinations, offering unparalleled control over the audio signal. This functionality is particularly useful for live sound applications where quick adjustments are often required. The intuitive interface allows for both simple and complex routing configurations, catering to both novice and experienced users. Mastering the routing capabilities unlocks the full potential of the Si Impact, enabling precise control over every aspect of the audio mix.

Saving and Recalling Scenes
Scene management allows storing and loading complete console setups. User profiles personalize the Si Impact, preserving preferred settings for quick recall and consistent performance.

Scene Management: Storing and Loading Presets
The Soundcraft Si Impact’s scene management system is crucial for efficient workflow. Scenes capture all console settings – fader levels, EQ, dynamics, effects, routing, and more – allowing for instant recall of complex setups. To save a scene, navigate to the ‘Scene’ menu and select ‘Save’. Give the scene a descriptive name for easy identification.
Loading a scene is equally straightforward. Access the ‘Scene’ menu and choose ‘Load’. A list of saved scenes will appear; select the desired scene to instantly restore the console to its previously saved state. The console will prompt for confirmation before overwriting the current settings.
Consider using a consistent naming convention for scenes to maintain organization, especially in live sound environments. Regularly backing up scenes to a USB drive is recommended to safeguard against data loss. The Si Impact supports a substantial number of scene storage locations, accommodating diverse performance requirements.
User Profiles: Customizing the Console
The Soundcraft Si Impact allows for personalized operation through User Profiles. These profiles store individual preferences for display settings, fader feel, and control surface assignments, tailoring the console to each engineer’s workflow. Access the ‘Setup’ menu, then ‘User Profiles’ to create, edit, or load profiles.
Within a profile, you can customize the visual layout, including fader colors and labeling. Adjust fader sensitivity to match your preferred touch. Control surface assignments allow remapping of physical controls to different parameters, optimizing access to frequently used functions.
Creating multiple profiles is beneficial for different users or applications. For example, a ‘Live Sound’ profile might prioritize quick access to EQ and dynamics, while a ‘Recording’ profile could focus on routing and monitor control. Regularly saving your profile ensures your personalized settings are preserved, even after power cycles or software updates.

Troubleshooting Common Issues
This section addresses typical problems, including audio dropouts, connectivity issues, and software glitches. Solutions and preventative measures are provided for a smooth workflow.

Audio Dropouts and Noise
Experiencing audio dropouts or unwanted noise? Several factors can contribute to these issues on the Soundcraft Si Impact. First, verify all cable connections are secure – loose cables are a common culprit. Check for ground loops, which can introduce hum; try different power outlets or a ground lift adapter (use cautiously!).
Insufficient USB bandwidth can cause dropouts when using the digital I/O. Close unnecessary applications on your computer and ensure the USB port meets the console’s requirements. Examine gain staging throughout the signal path; excessive gain can lead to distortion and noise.
Inspect the DSP load; high processing demands can cause glitches. Reduce the number of active effects or lower the sample rate if necessary. Finally, ensure the console’s firmware is up-to-date, as updates often include bug fixes and performance improvements. If problems persist, consult the Soundcraft support website for further assistance.
Connectivity Problems
Encountering difficulties establishing a connection with your Soundcraft Si Impact? Begin by verifying the physical connections – USB, AES/EBU, or Ethernet – ensuring cables are securely plugged into both the console and your computer or network. Confirm your computer recognizes the console as a USB audio device; check device manager settings.
For network connectivity, verify IP address settings and network configuration. Ensure the console and computer are on the same subnet. If using a USB hub, try connecting the console directly to the computer.
Driver issues can also cause connectivity problems; reinstall the latest Soundcraft USB drivers. Check for firewall settings that might be blocking communication. If problems persist with digital I/O, test with different cables and ports. Refer to the Soundcraft support documentation for specific troubleshooting steps related to your operating system and connection type.
Software Updates and Firmware
Maintaining up-to-date software and firmware is crucial for optimal Soundcraft Si Impact performance. Regularly check the Soundcraft website for the latest updates, as these often include bug fixes, performance enhancements, and new features. Firmware updates are typically applied via USB connection using the Soundcraft software application.
Before updating, carefully read the release notes to understand the changes and any potential compatibility issues. Always back up your scenes and settings before initiating a firmware update to prevent data loss. Follow the on-screen instructions precisely during the update process, and avoid interrupting the process.
Ensure a stable power supply during updates. The software provides tools for managing firmware versions and restoring previous versions if necessary. Consistent updates ensure compatibility and access to the latest improvements for your Si Impact console.