diff --git a/.github/workflows/Documentation.yml b/.github/workflows/Documentation.yml
index 8d03b23..811a4c6 100644
--- a/.github/workflows/Documentation.yml
+++ b/.github/workflows/Documentation.yml
@@ -7,10 +7,10 @@ jobs:
   document:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: julia-actions/setup-julia@latest
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v2
         with:
-          version: '1.6'
-      - uses: julia-actions/julia-docdeploy@releases/v1
+          version: 1
+      - uses: julia-actions/julia-docdeploy@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/Tests.yml b/.github/workflows/Tests.yml
index f21b7bc..5b31b5b 100644
--- a/.github/workflows/Tests.yml
+++ b/.github/workflows/Tests.yml
@@ -11,7 +11,7 @@ on:
 jobs:
   test:
     timeout-minutes: 30
-    name: ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} 
+    name: ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -29,13 +29,13 @@ jobs:
           - x86
 
     steps:
-      - uses: actions/checkout@v2
-      - uses: julia-actions/setup-julia@v1
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v1
+      - uses: codecov/codecov-action@v4
         with:
           file: lcov.info
diff --git a/.gitignore b/.gitignore
index 89b826a..96876f5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,7 @@ coverage
 deps/usr/lib/pa_shim.so
 deps/usr/lib/pa_shim.dylib
 deps/usr/lib/pa_shim.dll
+.DS_Store
+LocalPreferences.toml
+Manifest.toml
+settings.json
diff --git a/Project.toml b/Project.toml
index c82362b..51777a9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -14,6 +14,7 @@ Suppressor = "fd094767-a336-5f1f-9728-57cf17d0bbfb"
 julia = "1.6"
 alsa_plugins_jll = "1.2.2"
 libportaudio_jll = "19.6.0"
+LinearAlgebra = "1"
 SampledSignals = "2.1.1"
 Suppressor = "0.2"
 
diff --git a/examples/lilyplay.jl b/examples/lilyplay.jl
index a9904f6..1793354 100644
--- a/examples/lilyplay.jl
+++ b/examples/lilyplay.jl
@@ -8,7 +8,7 @@ function paudio()
     devs = PortAudio.devices()
     if DEFAULTDEVICE < 0
         devnum = findfirst(x -> x.maxoutchans > 0, devs)
-        (devnum == nothing) && error("No output device for audio found")
+        (devnum === nothing) && error("No output device for audio found")
     else
         devnum = DEFAULTDEVICE + 1
     end
@@ -43,19 +43,19 @@ end
 
 function parsevoice(melody::String; tempo = 132, beatunit = 4, lyrics = nothing)
     ostream = paudio() # initialize audio for output
-    lyrics_syllables = lyrics == nothing ? nothing : split(lyrics)
-    lyrics_syllables != nothing && (lyrics_syllables[end] *= "\n")
+    lyrics_syllables = lyrics === nothing ? nothing : split(lyrics)
+    lyrics_syllables !== nothing && (lyrics_syllables[end] *= "\n")
     note_idx = 1
     oldduration = 4
     for line in split(melody, '\n')
         percent_idx = findfirst('%', line) # Trim comment
-        percent_idx == nothing || (line = line[1:(percent_idx - 1)])
+        percent_idx === nothing || (line = line[1:(percent_idx - 1)])
         for token in split(line)
             pitch, duration, dotted, sustained = parsetoken(token)
-            duration == nothing && (duration = oldduration)
+            duration === nothing && (duration = oldduration)
             oldduration = duration
             dotted && (duration *= 1.5)
-            if lyrics_syllables != nothing && 1 <= note_idx <= length(lyrics_syllables)
+            if lyrics_syllables !== nothing && 1 <= note_idx <= length(lyrics_syllables)
                 # Print the lyrics, omitting hyphens
                 if lyrics_syllables[note_idx][end] == '-'
                     print(join(split(lyrics_syllables[note_idx][:], "")[1:(end - 1)]), "")