The Roland SP-404SX is a versatile and portable sampling workstation. It is a powerful and intuitive sampler and sequencer that allows users to create and manipulate loops, samples, and beats. It features a variety of onboard effects, a built-in microphone, and a large but primitive display. The SP-404SX is ideal for DJs, producers, and live performers.

Core Specifications

• Maximum Polyphony: 12 voices
• Audio Format: 16-bit linear (.wav/.aiff)
• Sampling Rate: 44.1 kHz
• 29 effects types, effects continue processing when input is muted
• Interface: 12 trigger pads + 1 sub pad
• Controls: 3 control knobs
• Display: 7-segment LED (3 characters)

Sample Storage

• Capacity: 120 samples (12 samples × 10 banks)
• Storage Medium: SD card
• Maximum Single Sample Length: 180 minutes stereo (2 GB)

Recording Capacity by SD Card Size

• 1 GB: ~90 min (stereo) / 180 min (mono)
• 2 GB: ~180 min (stereo) / 360 min (mono)
• 4 GB: ~360 min (stereo) / 720 min (mono)
• 8 GB: ~720 min (stereo) / 24 hours (mono)
• 16 GB: ~24 hours (stereo) / 48 hours (mono)
• 32 GB: ~48 hours (stereo) / 96 hours (mono)

Pattern Storage

• Capacity: 120 patterns (12 patterns × 10 banks)
• Storage Location: SD card

Pattern Sequencer

• Maximum Notes: ~16,000 notes
• Resolution: 96 ticks per quarter note
• Pattern Length: 1-99 measures
• Recording Method: Realtime Loop Recording
• Features: Shuffle quantize function

Audio I/O

• Line Input: RCA stereo
• Line Output: RCA stereo
• Headphone Output: 1/4" stereo
• Microphone Input: 1/4" mono
• Built-in Microphone: Mono

MIDI Connectivity

• MIDI Input: Standard MIDI IN connector

Power Specifications

• AC Adapter (included)
• 6× AA Batteries (alkaline or Ni-MH rechargeable)
• Ni-MH Rechargeable: ~5 hours (with 1,900 mAh batteries)
• Alkaline: ~4 hours
• Current Draw: 450 mA

Key Strengths:

• Built-in effects that continue running even when input is muted
• Direct recording to SD card in standard WAV/AIFF formats
• Battery-powered operation, making it highly portable
• Simple, user-friendly interface
• High-quality effects selection
• Improved features over previous models, including better time stretch and pattern copy functions

Common Use Cases:

• Live performance and groove production
• Educational settings (notably used with beginners for music programs)
• Street music
• Portable beat-making
• Secondary sampler complementing other equipment

Limitations&Drawbacks:

• No dedicated song mode for pattern arrangement
• Sample editing and beat syncing to metronome require some learning
• RCA inputs/outputs instead of 1/4-inch jacks
• The volume knob can become loose if not handled carefully
• 12 pads instead of 16

While it may not match the capabilities of higher-end samplers/ grooveboxes like the Akai MPC1000 or Korg ESX-1, the SP-404SX offers excellent value as both a starter sampler and a portable option for more experienced users. Its simplicity and functionality make it suitable for various skill levels and musical applications and it stands very well against the age prooving its unique character loved by its users.

In the year 2017 the SP-404A has been introduced and it was a reissue of the SX with a different color scheme and different sample pack included.