Use Ctrl+X when you want to remove the selected audio and keep it on the clipboard. Press Delete when you want to remove it without replacing the clipboard. Use Ctrl+T when the selection is the part you want to keep and everything outside it should go.
Those three commands solve different jobs. In Sound Forge, Trim/Crop means keeping the selected range and removing the audio before and after it; Cut and Delete do the opposite by removing the selection itself. The table below is the short version; the rest of this guide covers precise selections, zero crossings, automatic silence removal, multichannel files and event-based editing in Sound Forge Pro 2026.
| Command | Shortcut | What remains | Clipboard |
|---|---|---|---|
| Edit → Cut | Ctrl+X | Audio outside the selection | Selected audio replaces the previous clipboard contents |
| Edit → Delete (Clear) | Delete | Audio outside the selection | Unchanged |
| Edit → Trim/Crop | Ctrl+T | Only the selected audio | Unchanged |
Make a precise selection first
- Select the Edit tool.
- Click and drag across the waveform to mark the audio you want to remove or keep.
- Check Selection Start, End and Length in the selection status bar.
- Double-click a status-bar field when you need to type an exact time value.
- Zoom in and move the edges before committing the edit.
The current Boris FX selection reference confirms that Selection Start moves the cursor when no range exists, while Selection End or Length can define and edit a selection. Right-click the status area to choose the time format that fits the job—time, samples, frames or another available ruler format.
For stereo and multichannel files, dragging inside one channel selects only that channel. Drag across channels, or along the divider/loop bar, to select more than one. The 2026 mouse-selection guide also documents Ctrl+click for adding or removing a channel from the selection and the Lock Channel Selection button for preserving the channel set while changing the time range.
Cut: remove the selection and keep it
Choose Edit → Cut or press Ctrl+X. Sound Forge removes the selected sound data and copies it to the clipboard, replacing whatever was there before. You can then position the cursor and press Ctrl+V to paste it, or Ctrl+E to paste it into a new data window.
Cut is the right choice when you might reuse the removed section. If you only want it gone, Delete is safer because it leaves the existing clipboard alone. The official Cut documentation also spells out an easily missed multichannel behavior: cutting data from an individual channel leaves silence at the end of that channel because every channel in the file must remain the same length.
Delete/Clear: remove it without touching the clipboard
Select the unwanted audio and press Delete, or choose Edit → Delete (Clear). The selection is removed without being copied. This is the cleanest command for a cough, false start or dead section that you will not paste elsewhere.
There is one special case. If Edit → Playlist/Cutlist → Treat as Cutlist is enabled, Delete creates a Cutlist region instead of removing the selection. If Delete appears to do nothing to the waveform, check that mode before troubleshooting the keyboard. That behavior and the same individual-channel end-silence rule are documented on the current Delete/Clear help page.
Trim/Crop: keep the selection and discard the outside
Highlight the audio you want to keep, then choose Edit → Trim/Crop or press Ctrl+T. Sound Forge removes all data outside the selection from the selected channel. Nothing is copied to the clipboard.
This is the fastest manual way to remove lead-in and tail material from a recording: select from the intended start to the intended finish, listen across both boundaries, and crop. The exact selected-channel scope comes from the Sound Forge Pro 2026 Trim/Crop reference. On a stereo or multichannel file, deliberately select every channel when you want one coherent start and end; do not assume a single-channel selection will crop the whole file.
If the retained audio begins or ends abruptly, undo and move the boundary, or select a short edge region and choose Process → Fade → Fade In or Fade Out. These are linear fades from −Inf to 0 dB and from 0 dB to −Inf respectively. Use Graphic Fade when a different curve is required. The right duration depends on the source; preserve the initial transient and the final natural decay rather than applying a fixed number.
Prevent clicks at edit points
A discontinuity between the samples on either side of a cut can produce a click. Editing near a zero crossing reduces that risk, but a visually quiet point is not automatically a zero crossing.
- Press Z for Edit → Selection → Snap to Zero, which moves both selection edges.
- Press Shift+Z for Snap Edge to Zero, which moves only the active edge.
- Press Ctrl+B to toggle automatic snap to zero crossings.
- Use Home or End to change the active selection edge before an edge-only snap.
The Editing preferences let you choose positive, negative or any zero crossing. The current Selection Snapping documentation uses the names “Snap to Zero” and “Snap Edge to Zero”; older articles often invent a different menu label. Snapping reduces click risk, but listen to the transition—two unrelated waveforms can still need a short fade or event crossfade.
Auto Trim/Crop: remove silence by detection
Choose Process → Auto Trim/Crop when the edit should be detected from level rather than placed manually. This is useful for repeated recordings with similar silence and noise, but it needs a threshold that separates the quietest wanted sound from the unwanted floor.
The 2026 dialog has five functions, not one generic “remove silence” mode:
| Function | What it does |
|---|---|
| Keep edges outside of the selection | Deletes silence between the selection boundaries and detected sound, but keeps data outside the selection |
| Remove edges outside of the selection | Deletes that silence and also deletes everything outside the selection |
| Remove silence between phrases (creates regions) | Deletes qualifying silence inside the selection and creates regions between phrases |
| Remove data beyond loop points | Deletes material after a selected loop while retaining the specified minimum samples after the loop end |
| Remove data from start and limit file length | Deletes a specified amount from the start and caps the converted file length |
Attack threshold detects the start; Release threshold detects the end. Fade In and Fade Out protect the detected phrase boundaries, while Minimum inter-phrase silence determines when the phrase mode creates a new region. These names and functions are verified against the current Auto Trim/Crop help.
Start conservatively. Preview or work on a copy, especially with breathy speech, reverb tails, soft instrument attacks and noisy archival recordings. A threshold that removes room tone can also remove intentional quiet material. For one important file, manual Trim/Crop is often faster than repairing an aggressive automatic result.
Zoom to the edit, then verify in context
Roll the mouse wheel to zoom horizontally; hold Ctrl while rolling to zoom vertically. Ctrl+Up Arrow zooms to an active selection, while Ctrl+Down Arrow returns to the normal time zoom. The Magnify tool lets you drag around the exact area without losing the selection.
At full horizontal zoom Sound Forge can display 24 pixels per sample. That is useful for placing an edge, but the final decision should be audible at normal scale. The current magnification guide documents the complete zoom set.
Split and trim events without changing the source range
A split is an event operation, not a direct equivalent of cutting sample data. Select the Event tool, position the cursor, select the event if needed, then choose Edit → Event → Split or press S. If no event is selected, Sound Forge splits the events under the cursor across all channels; if events are selected, only those events are split. Ctrl+Alt+T splits at region boundaries.
With the Event tool active, drag an event edge to trim it. The event cannot extend beyond its underlying media, but dragging the edge back can restore media that was only hidden by the trim. Hold Alt while dragging an event to slip its contents without moving the event; hold Alt while dragging an edge to slip-trim.
These behaviors are documented in the current Splitting Events and Slipping and Trimming Events pages. They are the right tools when you need adjustable edit boundaries. For a finished single-file crop, the Edit-tool selection plus Ctrl+T remains simpler.
Keep a safe way back
Ctrl+Z reverses the last edit and Ctrl+Shift+Z redoes it. When Undo past Save is enabled in General preferences, history remains available after saving until you close the data window or exit Sound Forge. A saved Sound Forge Pro project is required if you want to preserve undoable edit history across closing and reopening.
For irreplaceable recordings, use Save As before destructive data edits. Undo is a workflow feature, not a backup.
Frequently Asked Questions
What is the difference between Cut and Trim/Crop?
Cut removes the selection and copies it to the clipboard. Trim/Crop keeps the selection and removes everything outside it from the selected channel. Cut is for removing a middle section; Trim/Crop is for isolating the wanted range.
How do I crop audio in Sound Forge Pro?
Select the audio you want to keep, then press Ctrl+T or choose Edit → Trim/Crop. Check the selected channels before applying it to a stereo or multichannel file.
How do I remove silence from the beginning and end?
For one file, select from the intended first sound to the final decay and use Trim/Crop. For repeatable level-based detection, choose Process → Auto Trim/Crop and use Remove edges outside of the selection.
Why does a cut click or pop?
The new join may contain a waveform discontinuity. Use Z or Shift+Z to snap the selection to zero crossings, listen to the join, and add a short fade or event crossfade when snapping alone is not enough.
Can I enter an exact cut time?
Yes. Double-click Selection Start, End or Length in the status bar and type the value in the active time format. Then apply Cut, Delete or Trim/Crop.
Does Trim/Crop always affect every channel?
No. The current documentation says it removes outside data from the selected channel. Select all required channels deliberately when you need one coherent crop across a stereo or multichannel file.
How do I split at the cursor?
Use the Event tool, position the cursor and press S, or choose Edit → Event → Split. This splits events; it is not a separate destructive split command for raw waveform data.
Once the boundaries are clean, measure the finished level with the current normalization workflow and create the delivery copy with the verified MP3 export steps. For repetitive editing, keep the Sound Forge shortcut reference beside the editor instead of relying on legacy key maps.
Last fact-checked: August 2, 2026 against the current Boris FX Sound Forge 2026 selection, Cut, Delete/Clear, Trim/Crop, snapping, Auto Trim/Crop, zoom and event-editing documentation.