.gitignore

@@ -47,3 +47,6 @@ packaging/npu-runtime/*.zip
 # not committed.
 src-tauri/vulkan-1.dll
 MEMORY.md
+# ASR bench corpus (test_parakeet branch): LibriSpeech-derived WAVs + refs,
+# staged by scripts/bench/fetch-corpus.ps1 — audio never enters the repo.
+bench-corpus/

scripts/bench/fetch-corpus.ps1

@@ -0,0 +1,44 @@
+# Stages the WER corpus for asr_bench: the first N LibriSpeech test-clean
+# utterances as 16 kHz mono WAV + one reference .txt each, under bench-corpus\
+# at the repo root (git-ignored — audio never enters the repo).
+param([int]$Utterances = 30)
+$ErrorActionPreference = "Stop"
+
+if (-not (Get-Command ffmpeg -ErrorAction SilentlyContinue)) {
+    throw "ffmpeg is required on PATH (same requirement as the app's Import feature)"
+}
+
+$repo = Split-Path -Parent (Split-Path -Parent $PSScriptRoot)
+$corpus = Join-Path $repo "bench-corpus"
+$cache = "$env:LOCALAPPDATA\WhispAssist\models\bench-cache"
+New-Item -ItemType Directory -Force $corpus, $cache | Out-Null
+
+$tarball = Join-Path $cache "test-clean.tar.gz"
+if (-not (Test-Path $tarball)) {
+    Write-Output "downloading LibriSpeech test-clean (~346 MB)"
+    curl.exe -sL -o "$tarball.part" "https://www.openslr.org/resources/12/test-clean.tar.gz"
+    if ($LASTEXITCODE -ne 0) { throw "download failed ($LASTEXITCODE)" }
+    Move-Item -Force "$tarball.part" $tarball
+}
+$extracted = Join-Path $cache "LibriSpeech\test-clean"
+if (-not (Test-Path $extracted)) {
+    Write-Output "extracting"
+    tar -xzf $tarball -C $cache
+    if ($LASTEXITCODE -ne 0) { throw "extract failed ($LASTEXITCODE)" }
+}
+
+$flacs = Get-ChildItem -Recurse -Filter *.flac $extracted | Sort-Object FullName |
+    Select-Object -First $Utterances
+foreach ($f in $flacs) {
+    $name = $f.BaseName
+    $wav = Join-Path $corpus "$name.wav"
+    if (-not (Test-Path $wav)) {
+        ffmpeg -v error -y -i $f.FullName -ar 16000 -ac 1 $wav
+        if ($LASTEXITCODE -ne 0) { throw "ffmpeg failed on $name" }
+    }
+    $trans = Get-ChildItem -Path $f.DirectoryName -Filter *.trans.txt | Select-Object -First 1
+    $line = Get-Content $trans.FullName | Where-Object { $_.StartsWith("$name ") } | Select-Object -First 1
+    if (-not $line) { throw "no reference line for $name" }
+    Set-Content -Encoding utf8 -NoNewline (Join-Path $corpus "$name.txt") $line.Substring($name.Length + 1)
+}
+Write-Output "staged $($flacs.Count) utterances in $corpus"