Voice Tools

Browse, play, replace, and repack audio from all four PCK sound archives.

Table of Contents

  1. Overview
  2. Getting Started
  3. The Interface
    1. Category Tabs
    2. Sound List Columns
    3. Audio Playback Bar
  4. Playing Sounds
    1. Double-Click to Play
    2. Single-Click then Play
  5. Extracting Sounds
    1. Extract All
    2. Extracting Individual Sounds
  6. Replacing Sounds
  7. Saving a Modified Archive
  8. PCK File Format Reference
    1. Filename Section
    2. Pack Section
    3. Alignment
  9. Practical Example: Replacing an English Voice Line
  10. Troubleshooting
  11. Contributing
  12. License

Overview

Voice Tools gives you full read/write access to the game’s PCK audio archives. All four archives are loaded automatically when a game path is set:

ArchiveFileContents
BGMGameData/app/BGM.pckBackground music tracks
Sound EffectsGameData/app/SE.pckIn-game sound effects
Voice (JP)GameData/app/Voice.pckJapanese voice acting
Voice (EN)GameData/app/Voice-en.pckEnglish voice acting

The tool supports both extraction (saving sounds to disk) and replacement (swapping individual entries with new audio), followed by saving the modified archive back as a valid .pck file.

Getting Started

  1. Open DokaponSoFTools.App.exe.
  2. Set your game directory in the main toolbar.
  3. Navigate to Voice Tools in the left panel.
  4. All four PCK archives load automatically into their respective tabs.

If the game path has not been set, or if you want to work with a PCK file from a different location, click Browse PCK… in the toolbar and select a file manually.

The Interface

Category Tabs

The main area is a tab control with one tab per PCK archive:

  • BGM — music tracks, typically larger files
  • Sound Effects — short sound effects
  • Voice (JP) — Japanese voice lines (file names like V_0001.voice)
  • Voice (EN) — English voice lines (same naming convention)

Switching tabs switches the active archive. All toolbar actions (Extract All, Replace Selected, Save PCK) operate on whichever tab is currently selected.

Sound List Columns

Each tab contains a data grid with the following columns:

ColumnDescription
#Index of the entry within the archive (zero-based)
NameInternal filename stored in the PCK header
FormatOpus if the data begins with OggS, otherwise Raw
SizeFile size of the individual sound entry

All entries in the base game archives use Opus audio in an Ogg container.

Audio Playback Bar

A compact playback bar sits at the bottom of the view:

  • Play — start playback of the selected entry
  • Stop — stop playback immediately
  • Now playing label — shows the name of the currently playing sound

In-app playback uses the Concentus pure C# Opus decoder. No system codec or external player is required.

Playing Sounds

Double-Click to Play

Double-click any row in the sound list to play that entry immediately. This is the fastest way to audition sounds while scrolling through a large archive.

Single-Click then Play

Select a row by clicking it once to set it as the active selection, then click Play in the bottom bar. Use Stop to halt playback at any time.

Extracting Sounds

Extract All

  1. Select the tab for the archive you want to extract.
  2. Click Extract All in the toolbar.
  3. Choose an output directory in the folder browser dialog.
  4. All sounds in the current archive are saved to that directory using their internal names (e.g. V_0001.voice, BGM_00.voice).

Extracted files are written with their original names and raw Ogg/Opus data intact — no transcoding occurs. These files can be played directly in VLC, Firefox, or converted with FFmpeg:

ffmpeg -i V_0001.voice output.mp3

Extracting Individual Sounds

There is no dedicated single-file extract button. To extract one sound, use Extract All to a temporary directory, then take only the file you need.

Replacing Sounds

  1. In the sound list, click the entry you want to replace to select it.
  2. Click Replace Selected in the toolbar.
  3. Choose a replacement audio file. Supported input formats:
    • .opus — Ogg Opus (native game format, no conversion needed)
    • .ogg — Ogg Vorbis or Ogg Opus container
    • .wav — PCM WAV (will be stored as raw bytes; best to use Opus)

For the best result, encode your replacement audio as Ogg Opus before importing. This matches the format already used by the game and keeps file sizes small. The tool accepts other formats as raw bytes, but they may not play correctly in-game if the decoder expects Opus.

The replacement is held in memory. The original .pck file on disk is not changed until you click Save PCK.

Saving a Modified Archive

After making replacements, click Save PCK to write the modified archive to disk:

  1. A save dialog appears with the original archive name pre-filled (e.g. Voice-en.pck).
  2. Choose an output path — save to a new file name during testing, then replace the original once confirmed.
  3. The tool writes a fully valid PCK file with the updated sound entries and correct internal offsets.

The saved PCK can be dropped directly into the game’s GameData/app/ directory to replace the original.

PCK File Format Reference

The .pck format is a simple archive with three sections:

Filename Section

Begins with the 20-byte ASCII header "Filename ". Contains:

  • A 4-byte total section size
  • A table of 4-byte filename offsets (one per entry)
  • Null-terminated ASCII filenames

Pack Section

Begins with the 20-byte ASCII header "Pack ". Contains:

  • A 4-byte section length
  • A 4-byte entry count
  • An info array: one (offset, size) pair (8 bytes each) per entry
  • The raw sound data, each entry aligned to 16 bytes

Alignment

The Filename section is padded to 8-byte alignment before the Pack section begins. Sound data entries within the Pack section are padded to 16-byte alignment.

Practical Example: Replacing an English Voice Line

Suppose you want to replace the English voice line V_0044.voice with a custom recording:

  1. Record or obtain your replacement audio as my_recording.opus.
  2. In Voice Tools, switch to the Voice (EN) tab.
  3. Locate V_0044.voice in the list (use the scroll bar or sort by name).
  4. Click the row to select it.
  5. Click Replace Selected and choose my_recording.opus.
  6. Click Save PCK, name the output Voice-en.pck.
  7. Back up the original Voice-en.pck in GameData/app/.
  8. Copy your new Voice-en.pck to GameData/app/.
  9. Launch the game and trigger the relevant dialogue to hear your replacement.

Troubleshooting

PCK archives do not load automatically Confirm that your game directory contains the folder structure GameData/app/ and that the PCK files are present. Run the Game Scanner tool to check which key files exist.

Playback produces no sound Check your system’s default audio output device. The Concentus decoder writes to the Windows audio session. If the sound entry shows format Raw instead of Opus, the file may not be standard Ogg Opus and in-app playback may not work.

Save PCK produces a file that crashes the game Ensure replacement audio uses the same Ogg Opus format as the original. Replacing an Opus entry with a WAV or MP3 file stored as raw bytes will result in a PCK that fails to parse at runtime.

“Sound not found” error when replacing The replacement lookup matches by filename stem (without extension). Verify that the selected entry in the list matches the name shown in the toolbar status log.

Contributing

Found a bug or want to suggest an improvement? Open an issue on GitHub or join the Discord.

License

This tool is part of DokaponSoFTools, released under The Unlicense (public domain). See the LICENSE file for full details.