P153 / Audio connections / Guide

Audio interfaces: shared inputs are not extra channels

Document signal role, channel layout and power separately from connector shape.

The useful distinction

Read the exact model and physical port label, then the manufacturer description of its role.

Claim inspection dates: 2026-10-03 · Independent review pending

Guide note · not an individual product specification

The useful distinction

Understand the requirement.

Record the physical channel behind a jack and the scope of a shared control. [C153A]

The Solo 4th Gen front line/instrument input is channel 1, while its rear microphone input is channel 2. [C153B]

Bounded facts, visible unknowns

Specifications and limits

Audio interfaces: shared inputs are not extra channels facts and limitations
Workflow boundary	Scoped analog audio documentation; not wiring or compatibility approval. [C153A] [C153B]
Verified device list	Not included. Check exact device and accessory documentation.

A boundary, not an omission to guess around.

The patch sheet links alternative endpoint presentations to one resource on a particular physical unit. Reusing a channel creates a conflict even when the connector names differ.

Before you connect

What to check

Identify the exact device and port.
Keep shared channels and controls explicit.
Retain unknown power, mode and cable observations.

Trace a supported connection class →

Record the input mode

For selectable line/instrument inputs, choose an observed mode. Unknown stays unknown. Selecting an instrument source does not automatically put an interface into instrument mode.

Distinguish feed sharing from jack sharing

Sharing a software playback feed does not prevent using physically distinct line and headphone outputs. The sheet rejects duplicate physical allocation, not every shared signal source. It does not promise independent monitor mixes.

Your next step

Move from the form to the requirement.

Compare this field note See the differences without assuming interchangeability.Work through a connection Choose your task before deciding on a cable.Explore this evidence trail Inspect the claims and their dependencies.

The source trail

Evidence for this page

AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.

C153ASource checked · pending review

On the Scarlett 2i2 4th Gen, inserting a front jack disables the corresponding rear XLR input.

Focusrite · 2i2 4th Gen hardware features ↗

Locator: Front/rear panels, line/instrument and phantom power sections
Access: public page. This is not permission to enable phantom power on unknown connected equipment.

S137: full source recordInspect review dependencies →

Claim scope: Exact-model analog audio reference; no end-to-end compatibility or electrical approval.. Next review due 2027-01-01.

C153BSource checked · pending review

The Solo 4th Gen front line/instrument input is channel 1, while its rear microphone input is channel 2.

Focusrite · Scarlett Solo 4th Gen hardware features ↗

Locator: Front panel, rear panel, speaker outputs and microphone input
Access: public page. Do not apply the different third-generation Solo layout; neither cable condition nor software routing is verified.

S135: full source recordInspect review dependencies →

Claim scope: Exact-model analog audio reference; no end-to-end compatibility or electrical approval.. Next review due 2027-01-01.

Suggest a correction to this field note →

Audio connection desk

Follow the signal beyond the plug

Signal roles, channel layouts and power requirements are distinct from connector shape. No hardware approval is implied.

Audio desk Audio patch sheet

Evidence behind this page

Scope first. Source second. Approval separate.

2 linked sources · 2 scoped claims · 0 sources with inspection/access flags.

Page scope: consumer_reference_expansion

Assessment 2026-10-22 · earliest scheduled source review 2027-01-01. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 2 source scopes, access limits and dates

S135 · Scarlett Solo 4th Gen hardware features

Focusrite · Manufacturer / product-owner domain · inspected 2026-10-03 · due 2027-01-01

Within inspection window

Scoped support: Solo 4th Gen: microphone input 2, front line/instrument input 1 and rear line outputs.

Not established / limitations: Do not apply the different third-generation Solo layout; neither cable condition nor software routing is verified.

Locator: Front panel, rear panel, speaker outputs and microphone input

S137 · 2i2 4th Gen hardware features

Focusrite · Manufacturer / product-owner domain · inspected 2026-10-03 · due 2027-01-01

Within inspection window

Scoped support: Scarlett 2i2 4th Gen exact physical channel and phantom scope.

Not established / limitations: This is not permission to enable phantom power on unknown connected equipment.

Locator: Front/rear panels, line/instrument and phantom power sections

Trace 2 claims to their source records

C153A · P153

On the Scarlett 2i2 4th Gen, inserting a front jack disables the corresponding rear XLR input.

Claim scope: Exact-model analog audio reference; no end-to-end compatibility or electrical approval.

Source links: S137 · Evidence trail → (private workspace)

C153B · P153

The Solo 4th Gen front line/instrument input is channel 1, while its rear microphone input is channel 2.

Claim scope: Exact-model analog audio reference; no end-to-end compatibility or electrical approval.

Source links: S135 · Evidence trail → (private workspace)

Prepare this page for review →Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.