diff --git a/Rakefile b/Rakefile
index 97b7739..eaf92d1 100644
--- a/Rakefile
+++ b/Rakefile
@@ -3,12 +3,21 @@
 require 'rake/testtask'
 require_relative 'lib/wavesync/version'
 
-Rake::TestTask.new do |t|
+Rake::TestTask.new(:test) do |t|
   t.libs << 'test'
-  t.pattern = 'test/**/*_test.rb'
+  t.pattern = 'test/wavesync/**/*_test.rb'
   t.verbose = false
 end
 
+namespace :test do
+  desc 'Run integration tests against connected devices'
+  Rake::TestTask.new(:integration) do |t|
+    t.libs << 'test'
+    t.pattern = 'test/integration/**/*_test.rb'
+    t.verbose = false
+  end
+end
+
 desc 'Run rubocop, steep check, and tests'
 task default: %i[rubocop steep test]
 
diff --git a/rakelib/fixtures.rake b/rakelib/fixtures.rake
index 8979fa8..6da81f2 100644
--- a/rakelib/fixtures.rake
+++ b/rakelib/fixtures.rake
@@ -49,5 +49,63 @@ namespace :fixtures do
            "#{FIXTURES_PATH}/44100_#{bit_depth}.#{ext}"
       end
     end
+
+    Rake::Task['fixtures:generate_click_track'].invoke
+  end
+
+  desc 'Generate click track fixture: 120 BPM, 2.5 bars, 44100Hz 16-bit WAV with ACID BPM'
+  task :generate_click_track do
+    require_relative '../lib/wavesync/acid_chunk'
+
+    click_bpm = 120
+    click_bars = 2.5
+    click_sample_rate = 44_100
+    click_ms = 30
+    downbeat_freq = 880
+    beat_freq = 440
+    output_path = "#{FIXTURES_PATH}/click_120bpm_2_5bars.wav"
+
+    beat_duration_ms = (60_000.0 / click_bpm).round
+    total_beats = (click_bars * 4).to_i
+    total_duration_s = click_bars * 4 * 60.0 / click_bpm
+
+    beat_times_ms = Array.new(total_beats) { |i| i * beat_duration_ms }
+    downbeat_times_ms = beat_times_ms.select.with_index { |_, i| (i % 4).zero? }
+    other_beat_times_ms = beat_times_ms - downbeat_times_ms
+
+    num_downbeats = downbeat_times_ms.size
+    num_other_beats = other_beat_times_ms.size
+
+    filter_parts = []
+    filter_parts << "[0]asplit=#{num_downbeats}#{(0...num_downbeats).map { |i| "[d#{i}]" }.join}"
+    filter_parts << "[1]asplit=#{num_other_beats}#{(0...num_other_beats).map { |i| "[b#{i}]" }.join}"
+
+    output_labels = []
+
+    downbeat_times_ms.each_with_index do |time_ms, i|
+      label = "od#{i}"
+      filter_parts << "[d#{i}]adelay=#{time_ms},apad=whole_dur=#{total_duration_s}[#{label}]"
+      output_labels << "[#{label}]"
+    end
+
+    other_beat_times_ms.each_with_index do |time_ms, i|
+      label = "ob#{i}"
+      filter_parts << "[b#{i}]adelay=#{time_ms},apad=whole_dur=#{total_duration_s}[#{label}]"
+      output_labels << "[#{label}]"
+    end
+
+    filter_parts << "#{output_labels.join}amix=inputs=#{total_beats}:normalize=0,volume=0.5"
+
+    sh 'ffmpeg', '-y',
+       '-f', 'lavfi', '-i', "sine=frequency=#{downbeat_freq}:sample_rate=#{click_sample_rate}:duration=#{click_ms / 1000.0}",
+       '-f', 'lavfi', '-i', "sine=frequency=#{beat_freq}:sample_rate=#{click_sample_rate}:duration=#{click_ms / 1000.0}",
+       '-filter_complex', filter_parts.join(';'),
+       '-acodec', 'pcm_s16le',
+       '-ar', click_sample_rate.to_s,
+       '-t', total_duration_s.to_s,
+       output_path
+
+    Wavesync::AcidChunk.write_bpm_in_place(output_path, click_bpm)
+    puts "Generated #{output_path} (#{click_bpm} BPM, #{click_bars} bars, #{total_duration_s}s)"
   end
 end
diff --git a/test/fixtures/click_120bpm_2_5bars.wav b/test/fixtures/click_120bpm_2_5bars.wav
new file mode 100644
index 0000000..c3998c3
Binary files /dev/null and b/test/fixtures/click_120bpm_2_5bars.wav differ
diff --git a/test/integration/integration_test_case.rb b/test/integration/integration_test_case.rb
new file mode 100644
index 0000000..362f504
--- /dev/null
+++ b/test/integration/integration_test_case.rb
@@ -0,0 +1,112 @@
+# frozen_string_literal: true
+
+require 'securerandom'
+require_relative '../wavesync/test_case'
+require_relative '../../lib/wavesync'
+
+module Wavesync
+  class IntegrationTestCase < Wavesync::TestCase
+    def self.device_model
+      raise NotImplementedError, "#{self} must define .device_model"
+    end
+
+    def setup
+      silence_output
+
+      config = begin
+        Wavesync::Config.load
+      rescue Wavesync::ConfigError
+        skip 'No wavesync config found (~/.wavesync.yml)'
+      end
+
+      device_config = config.device_configs.find { |dc| dc[:model] == self.class.device_model }
+      skip "No #{self.class.device_model} device configured in ~/wavesync.yml" unless device_config
+      skip "Device path not accessible: #{device_config[:path]}" unless File.exist?(device_config[:path])
+
+      @device = Wavesync::Device.find_by(name: device_config[:model])
+      @device_test_path = File.join(device_config[:path], 'wavesync_test', SecureRandom.hex(8))
+      @source_dir = Dir.mktmpdir
+
+      FileUtils.mkdir_p(@device_test_path)
+    end
+
+    def teardown
+      restore_output
+      FileUtils.rm_rf(@source_dir) if @source_dir
+      delete_from_device(@device_test_path) if @device_test_path
+    end
+
+    private
+
+    def source_file(dest_name, fixture:, bpm: nil, cue_points: nil)
+      dest_path = File.join(@source_dir, dest_name)
+      FileUtils.cp(File.join(FIXTURES_PATH, fixture), dest_path)
+      audio = Wavesync::Audio.new(dest_path)
+      audio.write_bpm(bpm) if bpm
+      audio.write_cue_points(cue_points) if cue_points
+      dest_path
+    end
+
+    def sync(pad: false)
+      Wavesync::Scanner.new(@source_dir).sync(@device_test_path, @device, pad: pad)
+    end
+
+    def device_file(relative_path)
+      File.join(@device_test_path, relative_path)
+    end
+
+    def assert_file_on_device(relative_path)
+      assert File.exist?(device_file(relative_path)), "Expected file on device: #{relative_path}"
+    end
+
+    def assert_file_not_on_device(relative_path)
+      refute File.exist?(device_file(relative_path)), "Expected no file on device: #{relative_path}"
+    end
+
+    def assert_acid_bpm(relative_path, expected_bpm)
+      actual_bpm = Wavesync::AcidChunk.read_bpm(device_file(relative_path))
+      assert_in_delta expected_bpm, actual_bpm.to_f, 0.01, "Expected ACID BPM #{expected_bpm} in #{relative_path}, got #{actual_bpm}"
+    end
+
+    def assert_no_acid_bpm(relative_path)
+      actual_bpm = Wavesync::AcidChunk.read_bpm(device_file(relative_path))
+      assert_nil actual_bpm, "Expected no ACID BPM in #{relative_path}, got #{actual_bpm}"
+    end
+
+    def assert_cue_points_on_device(relative_path, expected_cue_points)
+      actual_cue_points = Wavesync::CueChunk.read(device_file(relative_path))
+      assert_equal expected_cue_points.size, actual_cue_points.size,
+                   "Expected #{expected_cue_points.size} cue point(s) in #{relative_path}, got #{actual_cue_points.size}"
+      expected_cue_points.zip(actual_cue_points).each do |expected, actual|
+        assert_equal expected[:sample_offset], actual[:sample_offset]
+        assert_equal expected[:label], actual[:label] if expected.key?(:label)
+      end
+    end
+
+    def assert_sample_rate_on_device(relative_path, expected_hz)
+      actual_hz = Wavesync::Audio.new(device_file(relative_path)).sample_rate
+      assert_equal expected_hz, actual_hz, "Expected sample rate #{expected_hz}Hz in #{relative_path}, got #{actual_hz}"
+    end
+
+    def assert_duration_on_device(relative_path, expected_seconds, tolerance: 0.1)
+      actual_seconds = Wavesync::Audio.new(device_file(relative_path)).duration
+      assert_in_delta expected_seconds, actual_seconds, tolerance,
+                      "Expected duration #{expected_seconds}s in #{relative_path}, got #{actual_seconds}s"
+    end
+
+    def delete_from_device(dir_path)
+      return unless File.exist?(dir_path)
+
+      Dir.glob(File.join(dir_path, '**', '*'))
+         .reverse
+         .each do |entry|
+           File.file?(entry) ? File.delete(entry) : Dir.rmdir(entry)
+         rescue SystemCallError
+           nil
+         end
+      Dir.rmdir(dir_path)
+    rescue SystemCallError
+      nil
+    end
+  end
+end
diff --git a/test/integration/octatrack_sync_test.rb b/test/integration/octatrack_sync_test.rb
new file mode 100644
index 0000000..8595060
--- /dev/null
+++ b/test/integration/octatrack_sync_test.rb
@@ -0,0 +1,125 @@
+# frozen_string_literal: true
+
+require_relative 'integration_test_case'
+
+module Wavesync
+  class OctatrackSyncTest < IntegrationTestCase
+    def self.device_model = 'Octatrack'
+
+    test 'copies wav without bpm using original filename' do
+      source_file('track.wav', fixture: '44100_16.wav')
+      sync
+      assert_file_on_device 'track.wav'
+    end
+
+    test 'copies wav with bpm, bpm appended to filename' do
+      source_file('track.wav', fixture: '44100_16.wav', bpm: 120)
+      sync
+      assert_file_on_device 'track 120 bpm.wav'
+      assert_file_not_on_device 'track.wav'
+    end
+
+    test 'copies aif without bpm using original filename' do
+      source_file('track.aif', fixture: '44100_16.aif')
+      sync
+      assert_file_on_device 'track.aif'
+    end
+
+    test 'copies aif with bpm, bpm appended to filename' do
+      source_file('track.aif', fixture: '44100_16.aif', bpm: 130)
+      sync
+      assert_file_on_device 'track 130 bpm.aif'
+      assert_file_not_on_device 'track.aif'
+    end
+
+    test 'converts wav at 48000hz to 44100hz' do
+      source_file('track.wav', fixture: '48000_16.wav')
+      sync
+      assert_file_on_device 'track.wav'
+      assert_sample_rate_on_device 'track.wav', 44_100
+    end
+
+    test 'converts wav at 48000hz to 44100hz with bpm appended to filename' do
+      source_file('track.wav', fixture: '48000_16.wav', bpm: 128)
+      sync
+      assert_file_on_device 'track 128 bpm.wav'
+      assert_sample_rate_on_device 'track 128 bpm.wav', 44_100
+    end
+
+    test 'converts wav at 48000hz to 44100hz, rescaling cue point sample offsets' do
+      cue_points = [{ identifier: 1, sample_offset: 48_000, label: 'Drop' }]
+      source_file('track.wav', fixture: '48000_16.wav', cue_points: cue_points)
+      sync
+      rescaled_offset = (48_000 * 44_100 / 48_000.0).round
+      assert_cue_points_on_device 'track.wav', [{ identifier: 1, sample_offset: rescaled_offset, label: 'Drop' }]
+    end
+
+    test 'converts mp3 to wav' do
+      source_file('track.mp3', fixture: '44100.mp3')
+      sync
+      assert_file_on_device 'track.wav'
+      assert_file_not_on_device 'track.mp3'
+    end
+
+    test 'converts mp3 to wav with bpm appended to filename' do
+      source_file('track.mp3', fixture: '44100.mp3', bpm: 130)
+      sync
+      assert_file_on_device 'track 130 bpm.wav'
+    end
+
+    test 'converts m4a to wav' do
+      source_file('track.m4a', fixture: '44100.m4a')
+      sync
+      assert_file_on_device 'track.wav'
+      assert_file_not_on_device 'track.m4a'
+    end
+
+    test 'converts m4a to wav with bpm appended to filename' do
+      source_file('track.m4a', fixture: '44100.m4a', bpm: 95)
+      sync
+      assert_file_on_device 'track 95 bpm.wav'
+    end
+
+    test 'pads track to 64-bar boundary when bpm is present' do
+      source_file('click.wav', fixture: 'click_120bpm_2_5bars.wav')
+      sync(pad: true)
+      seconds_per_bar = 4 * 60.0 / 120
+      expected_duration = 64 * seconds_per_bar
+      assert_file_on_device 'click 120 bpm.wav'
+      assert_duration_on_device 'click 120 bpm.wav', expected_duration, tolerance: 0.5
+    end
+
+    test 'does not pad track when bpm is absent' do
+      source_file('track.wav', fixture: '44100_16.wav')
+      sync(pad: true)
+      assert_file_on_device 'track.wav'
+      assert_duration_on_device 'track.wav', 1.0, tolerance: 0.2
+    end
+
+    test 'replaces stale bpm filename on device when source bpm changes' do
+      source_file('track.wav', fixture: '44100_16.wav', bpm: 120)
+      sync
+      assert_file_on_device 'track 120 bpm.wav'
+
+      Wavesync::Audio.new(File.join(@source_dir, 'track.wav')).write_bpm(130)
+      sync
+
+      assert_file_on_device 'track 130 bpm.wav'
+      assert_file_not_on_device 'track 120 bpm.wav'
+    end
+
+    test 'writes cue points from device wav to source wav when source has none' do
+      cue_points = [{ identifier: 1, sample_offset: 44_100, label: 'Marker' }]
+      source_file('track.wav', fixture: '44100_16.wav', cue_points: cue_points)
+      sync
+
+      FileUtils.cp(File.join(FIXTURES_PATH, '44100_16.wav'), File.join(@source_dir, 'track.wav'))
+      sync
+
+      source_cue_points = Wavesync::CueChunk.read(File.join(@source_dir, 'track.wav'))
+      assert_equal 1, source_cue_points.size
+      assert_equal 44_100, source_cue_points[0][:sample_offset]
+      assert_equal 'Marker', source_cue_points[0][:label]
+    end
+  end
+end
diff --git a/test/integration/tp7_sync_test.rb b/test/integration/tp7_sync_test.rb
new file mode 100644
index 0000000..6738f5c
--- /dev/null
+++ b/test/integration/tp7_sync_test.rb
@@ -0,0 +1,93 @@
+# frozen_string_literal: true
+
+require_relative 'integration_test_case'
+
+module Wavesync
+  class Tp7SyncTest < IntegrationTestCase
+    def self.device_model = 'TP-7'
+
+    test 'copies wav without bpm, no acid bpm on device' do
+      source_file('track.wav', fixture: '44100_16.wav')
+      sync
+      assert_file_on_device 'track.wav'
+      assert_no_acid_bpm 'track.wav'
+    end
+
+    test 'copies wav with bpm, acid bpm injected on device' do
+      source_file('track.wav', fixture: '44100_16.wav', bpm: 120)
+      sync
+      assert_file_on_device 'track.wav'
+      assert_acid_bpm 'track.wav', 120
+    end
+
+    test 'copies wav with cue points, cue points preserved on device' do
+      cue_points = [
+        { identifier: 1, sample_offset: 11_025, label: 'A' },
+        { identifier: 2, sample_offset: 22_050, label: 'B' }
+      ]
+      source_file('track.wav', fixture: '44100_16.wav', cue_points: cue_points)
+      sync
+      assert_cue_points_on_device 'track.wav', cue_points
+    end
+
+    test 'copies wav with bpm and cue points, both preserved on device' do
+      cue_points = [{ identifier: 1, sample_offset: 11_025, label: 'Drop' }]
+      source_file('track.wav', fixture: '44100_16.wav', bpm: 140, cue_points: cue_points)
+      sync
+      assert_acid_bpm 'track.wav', 140
+      assert_cue_points_on_device 'track.wav', cue_points
+    end
+
+    test 'copies mp3 without converting it' do
+      source_file('track.mp3', fixture: '44100.mp3')
+      sync
+      assert_file_on_device 'track.mp3'
+    end
+
+    test 'converts m4a to wav' do
+      source_file('track.m4a', fixture: '44100.m4a')
+      sync
+      assert_file_on_device 'track.wav'
+      assert_file_not_on_device 'track.m4a'
+    end
+
+    test 'converts m4a to wav and injects bpm into acid chunk' do
+      source_file('track.m4a', fixture: '44100.m4a', bpm: 140)
+      sync
+      assert_file_on_device 'track.wav'
+      assert_acid_bpm 'track.wav', 140
+    end
+
+    test 'converts aif to wav and injects bpm into acid chunk' do
+      source_file('track.aif', fixture: '44100_16.aif', bpm: 100)
+      sync
+      assert_file_on_device 'track.wav'
+      assert_acid_bpm 'track.wav', 100
+    end
+
+    test 'skips wav on second sync when file already exists on device' do
+      source_file('track.wav', fixture: '44100_16.wav', bpm: 120)
+      sync
+      assert_acid_bpm 'track.wav', 120
+
+      Wavesync::Audio.new(File.join(@source_dir, 'track.wav')).write_bpm(130)
+      sync
+
+      assert_acid_bpm 'track.wav', 120
+    end
+
+    test 'writes cue points from device wav to source wav when source has none' do
+      cue_points = [{ identifier: 1, sample_offset: 44_100, label: 'Marker' }]
+      source_file('track.wav', fixture: '44100_16.wav', cue_points: cue_points)
+      sync
+
+      FileUtils.cp(File.join(FIXTURES_PATH, '44100_16.wav'), File.join(@source_dir, 'track.wav'))
+      sync
+
+      source_cue_points = Wavesync::CueChunk.read(File.join(@source_dir, 'track.wav'))
+      assert_equal 1, source_cue_points.size
+      assert_equal 44_100, source_cue_points[0][:sample_offset]
+      assert_equal 'Marker', source_cue_points[0][:label]
+    end
+  end
+end
diff --git a/test/wavesync/scanner_test.rb b/test/wavesync/scanner_test.rb
index 9a97b95..ae4c2a9 100644
--- a/test/wavesync/scanner_test.rb
+++ b/test/wavesync/scanner_test.rb
@@ -6,17 +6,14 @@
 module Wavesync
   class ScannerTest < Wavesync::TestCase
     def setup
+      silence_output
       @source_dir = Dir.mktmpdir
       @target_dir = Dir.mktmpdir
       @device = Device.find_by(name: 'TP-7')
-      @original_stdout = $stdout
-      @null_out = File.open(File::NULL, 'w') # rubocop:disable Style/FileOpen
-      $stdout = @null_out
     end
 
     def teardown
-      $stdout = @original_stdout
-      @null_out.close
+      restore_output
       FileUtils.rm_rf(@source_dir)
       FileUtils.rm_rf(@target_dir)
     end
diff --git a/test/wavesync/test_case.rb b/test/wavesync/test_case.rb
index c15edcf..c4d8dc0 100644
--- a/test/wavesync/test_case.rb
+++ b/test/wavesync/test_case.rb
@@ -9,5 +9,18 @@ class TestCase < Minitest::Test
     def self.test(name, &)
       define_method("test_#{name.gsub(/\s+/, '_')}", &)
     end
+
+    private
+
+    def silence_output
+      @original_stdout = $stdout
+      @null_out = File.open(File::NULL, 'w') # rubocop:disable Style/FileOpen
+      $stdout = @null_out
+    end
+
+    def restore_output
+      $stdout = @original_stdout
+      @null_out&.close
+    end
   end
 end