diff --git a/src/SoundFingerprinting.Tests/Integration/FingerprintCommandBuilderIntTest.cs b/src/SoundFingerprinting.Tests/Integration/FingerprintCommandBuilderIntTest.cs
index 365edb79..edc3b1da 100644
--- a/src/SoundFingerprinting.Tests/Integration/FingerprintCommandBuilderIntTest.cs
+++ b/src/SoundFingerprinting.Tests/Integration/FingerprintCommandBuilderIntTest.cs
@@ -107,7 +107,7 @@ public async Task CreateFingerprintsFromFileAndFromAudioSamplesAndGetTheSameResu
                                         .From(samples)
                                         .Hash();
 
-            AssertHashDatasAreTheSame(h1, h2);
+            AssertHashDataIsTheSame(h1, h2);
         }
 
         [Test]
@@ -147,7 +147,7 @@ public async Task CreateFingerprintsWithTheSameFingerprintCommandTest()
             var (h1, _) = await fingerprintCommand.Hash();
             var (h2, _) = await fingerprintCommand.Hash();
 
-            AssertHashDatasAreTheSame(h1, h2);
+            AssertHashDataIsTheSame(h1, h2);
         }
 
         [Test]
@@ -289,9 +289,9 @@ public async Task ShouldCreateSameFingerprintsDuringDifferentParallelRuns()
                 .UsingServices(audioService)
                 .Hash();
 
-            AssertHashDatasAreTheSame(hashDatas1, hashDatas2);
-            AssertHashDatasAreTheSame(hashDatas2, hashDatas3);
-            AssertHashDatasAreTheSame(hashDatas3, hashDatas4);
+            AssertHashDataIsTheSame(hashDatas1, hashDatas2);
+            AssertHashDataIsTheSame(hashDatas2, hashDatas3);
+            AssertHashDataIsTheSame(hashDatas3, hashDatas4);
         }
         
         [Test]
diff --git a/src/SoundFingerprinting.Tests/Integration/IntegrationWithSampleFilesTest.cs b/src/SoundFingerprinting.Tests/Integration/IntegrationWithSampleFilesTest.cs
index f829e0e6..ed7b3127 100644
--- a/src/SoundFingerprinting.Tests/Integration/IntegrationWithSampleFilesTest.cs
+++ b/src/SoundFingerprinting.Tests/Integration/IntegrationWithSampleFilesTest.cs
@@ -3,8 +3,6 @@
     using System.Collections.Generic;
     using System.IO;
     using System.Linq;
-    using System.Runtime.Serialization.Formatters.Binary;
-
     using Audio;
     using Data;
     using ProtoBuf;
@@ -13,11 +11,11 @@
 
     public abstract class IntegrationWithSampleFilesTest : AbstractTest
     {
-        protected readonly string pathToSamples = Path.Combine(TestContext.CurrentContext.TestDirectory, "chopinsamples.bin");
+        private readonly string pathToSamples = Path.Combine(TestContext.CurrentContext.TestDirectory, "chopinsamples.bin");
         
         protected readonly string PathToWav = Path.Combine(TestContext.CurrentContext.TestDirectory, "chopin_short.wav");
 
-        protected void AssertHashDatasAreTheSame(Hashes h1, Hashes h2)
+        protected static void AssertHashDataIsTheSame(Hashes h1, Hashes h2)
         {
             var firstHashes = h1.ToList();
             var secondHashes = h2.ToList();
@@ -36,7 +34,7 @@ protected void AssertHashDatasAreTheSame(Hashes h1, Hashes h2)
             }
         }
 
-        protected TagInfo GetTagInfo()
+        protected static TagInfo GetTagInfo()
         {
             return new TagInfo
             {
diff --git a/src/SoundFingerprinting.Tests/Properties/AssemblyInfo.cs b/src/SoundFingerprinting.Tests/Properties/AssemblyInfo.cs
index b7d16022..3dcfba6b 100644
--- a/src/SoundFingerprinting.Tests/Properties/AssemblyInfo.cs
+++ b/src/SoundFingerprinting.Tests/Properties/AssemblyInfo.cs
@@ -11,5 +11,5 @@
 [assembly: AssemblyCulture("")]
 [assembly: ComVisible(false)]
 [assembly: Guid("4cac962e-ebc5-4006-a1e0-7ffb3e2483c2")]
-[assembly: AssemblyVersion("9.4.0.101")]
-[assembly: AssemblyInformationalVersion("9.4.0.101")]
+[assembly: AssemblyVersion("9.4.2.100")]
+[assembly: AssemblyInformationalVersion("9.4.2.100")]
diff --git a/src/SoundFingerprinting.Tests/Unit/Utils/FastFingerprintDescriptorTest.cs b/src/SoundFingerprinting.Tests/Unit/Utils/FastFingerprintDescriptorTest.cs
index 9b7d2cc3..1648afe6 100644
--- a/src/SoundFingerprinting.Tests/Unit/Utils/FastFingerprintDescriptorTest.cs
+++ b/src/SoundFingerprinting.Tests/Unit/Utils/FastFingerprintDescriptorTest.cs
@@ -47,7 +47,7 @@ public async Task ShouldCreateExactlyTheSameFingerprints()
                     .From(audioSamples)
                     .Hash();
 
-                AssertHashDatasAreTheSame(h1, h2);
+                AssertHashDataIsTheSame(h1, h2);
             }
         }
 
diff --git a/src/SoundFingerprinting/Command/IUsingRealtimeQueryServices.cs b/src/SoundFingerprinting/Command/IUsingRealtimeQueryServices.cs
index a06c340f..142ca504 100644
--- a/src/SoundFingerprinting/Command/IUsingRealtimeQueryServices.cs
+++ b/src/SoundFingerprinting/Command/IUsingRealtimeQueryServices.cs
@@ -12,40 +12,40 @@ public interface IUsingRealtimeQueryServices : IRealtimeQueryCommand
         /// <summary>
         ///  Sets the model service that will be used as the data source during query.
         /// </summary>
-        /// <param name="modelService">ModelService to query.</param>
+        /// <param name="queryService">ModelService to query.</param>
         /// <returns>Realtime command.</returns>
-        IRealtimeQueryCommand UsingServices(IModelService modelService);
+        IRealtimeQueryCommand UsingServices(IQueryService queryService);
 
         /// <summary>
         ///  Sets the model service that will query the datasource, as well as the audio service that will read content to fingerprint.
         /// </summary>
-        /// <param name="modelService">ModelService to query.</param>
+        /// <param name="queryService">ModelService to query.</param>
         /// <param name="audioService">AudioService to use for file processing.</param>
         /// <returns>Realtime command.</returns>
-        IRealtimeQueryCommand UsingServices(IModelService modelService, IAudioService audioService);
+        IRealtimeQueryCommand UsingServices(IQueryService queryService, IAudioService audioService);
         
         /// <summary>
         ///  Sets the model service that will query the datasource, as well as the media service that will read content to fingerprint.
         /// </summary>
-        /// <param name="modelService">ModelService to query.</param>
+        /// <param name="queryService">ModelService to query.</param>
         /// <param name="mediaService">MediaService to use for file processing.</param>
         /// <returns>Realtime command.</returns>
-        IRealtimeQueryCommand UsingServices(IModelService modelService, IMediaService mediaService);
+        IRealtimeQueryCommand UsingServices(IQueryService queryService, IMediaService mediaService);
         
         /// <summary>
         ///  Sets the model service that will query the datasource, as well as the video service that will read content to fingerprint.
         /// </summary>
-        /// <param name="modelService">ModelService to query.</param>
+        /// <param name="queryService">ModelService to query.</param>
         /// <param name="videoService">VideoService to use for file processing.</param>
         /// <returns>Realtime command.</returns>
-        IRealtimeQueryCommand UsingServices(IModelService modelService, IVideoService videoService);
+        IRealtimeQueryCommand UsingServices(IQueryService queryService, IVideoService videoService);
         
         /// <summary>
         ///  Sets the model service that will query the datasource, as well as the realtime media service used to create fingerprints directly from a given URL.
         /// </summary>
-        /// <param name="modelService">ModelService to query.</param>
+        /// <param name="queryService">ModelService to query.</param>
         /// <param name="realtimeMediaService">Realtime media service to use.</param>
         /// <returns>Realtime command.</returns>
-        IRealtimeQueryCommand UsingServices(IModelService modelService, IRealtimeMediaService realtimeMediaService);
+        IRealtimeQueryCommand UsingServices(IQueryService queryService, IRealtimeMediaService realtimeMediaService);
     }
 }
\ No newline at end of file
diff --git a/src/SoundFingerprinting/Command/RealtimeQueryCommand.cs b/src/SoundFingerprinting/Command/RealtimeQueryCommand.cs
index b9d55df5..c139b028 100644
--- a/src/SoundFingerprinting/Command/RealtimeQueryCommand.cs
+++ b/src/SoundFingerprinting/Command/RealtimeQueryCommand.cs
@@ -31,7 +31,7 @@ public sealed class RealtimeQueryCommand : IRealtimeSource, IWithRealtimeQueryCo
         private Func<CancellationToken, IAsyncEnumerable<AVHashes>> realtimeCollection;
         private RealtimeQueryConfiguration configuration;
         private IRealtimeMediaService? realtimeMediaService;
-        private IModelService? modelService;
+        private IQueryService? queryService;
         private IMediaService? mediaService;
         private IVideoService? videoService;
         private IAudioService audioService;
@@ -135,41 +135,41 @@ public async Task<double> Query(CancellationToken cancellationToken)
             }
         }
 
-        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IModelService)"/>
-        public IRealtimeQueryCommand UsingServices(IModelService service)
+        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IQueryService)"/>
+        public IRealtimeQueryCommand UsingServices(IQueryService service)
         {
-            modelService = service;
+            queryService = service;
             return this;
         }
 
-        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IModelService,IAudioService)"/>
-        public IRealtimeQueryCommand UsingServices(IModelService modelService, IAudioService audioService)
+        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IQueryService,IAudioService)"/>
+        public IRealtimeQueryCommand UsingServices(IQueryService modelService, IAudioService audioService)
         {
-            this.modelService = modelService;
+            this.queryService = modelService;
             this.audioService = audioService;
             return this;
         }
 
-        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IModelService,IMediaService)"/>
-        public IRealtimeQueryCommand UsingServices(IModelService modelService, IMediaService mediaService)
+        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IQueryService,IMediaService)"/>
+        public IRealtimeQueryCommand UsingServices(IQueryService modelService, IMediaService mediaService)
         {
-            this.modelService = modelService;
+            this.queryService = modelService;
             this.mediaService = mediaService;
             return this;
         }
 
-        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IModelService,IVideoService)"/>
-        public IRealtimeQueryCommand UsingServices(IModelService modelService, IVideoService videoService)
+        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IQueryService,IVideoService)"/>
+        public IRealtimeQueryCommand UsingServices(IQueryService modelService, IVideoService videoService)
         {
-            this.modelService = modelService;
+            this.queryService = modelService;
             this.videoService = videoService;
             return this;
         }
 
-        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IModelService,IRealtimeMediaService)"/>
-        public IRealtimeQueryCommand UsingServices(IModelService modelService, IRealtimeMediaService realtimeMediaService)
+        /// <inheritdoc cref="IUsingRealtimeQueryServices.UsingServices(IQueryService,IRealtimeMediaService)"/>
+        public IRealtimeQueryCommand UsingServices(IQueryService modelService, IRealtimeMediaService realtimeMediaService)
         {
-            this.modelService = modelService;
+            this.queryService = modelService;
             this.realtimeMediaService = realtimeMediaService;
             return this;
         }
@@ -354,7 +354,7 @@ private void HandleQueryFailure(AVHashes? hashes, Exception e)
         }
 
         /// <summary>
-        ///  Queries local or remote <see cref="IModelService"/> with <see cref="AVHashes"/> gathered from offline storage.
+        ///  Queries local or remote <see cref="IQueryService"/> with <see cref="AVHashes"/> gathered from offline storage.
         /// </summary>
         /// <param name="cancellationToken">Cancellation token.</param>
         /// <returns>Async enumerable with <see cref="AVQueryResult"/>.</returns>
@@ -373,7 +373,7 @@ private async IAsyncEnumerable<AVQueryResult> QueryFromOfflineStorage([Enumerato
         }
 
         /// <summary>
-        ///  Tries querying associated <see cref="IModelService"/>.
+        ///  Tries querying associated <see cref="IQueryService"/>.
         /// </summary>
         /// <param name="hashes">An instance of <see cref="AVHashes"/>.</param>
         /// <param name="realtimeAggregator">Realtime aggregator.</param>
@@ -491,7 +491,7 @@ private async Task<AVQueryResult> GetAvQueryResult(AVHashes hashes)
                 .BuildQueryCommand()
                 .From(hashes)
                 .WithQueryConfig(configuration.QueryConfiguration)
-                .UsingServices(modelService)
+                .UsingServices(queryService)
                 .Query();
             var avQueryResult = queryResultInterceptor(queryResult);
             queryLength += (hashes.Audio?.DurationInSeconds + hashes.Audio?.TimeOffset ?? hashes.Video?.DurationInSeconds) ?? 0;
diff --git a/src/SoundFingerprinting/Properties/AssemblyInfo.cs b/src/SoundFingerprinting/Properties/AssemblyInfo.cs
index a60b095c..c067e08d 100644
--- a/src/SoundFingerprinting/Properties/AssemblyInfo.cs
+++ b/src/SoundFingerprinting/Properties/AssemblyInfo.cs
@@ -19,5 +19,5 @@
 [assembly: InternalsVisibleTo("SoundFingerprinting.FFT.FFTW")]
 [assembly: InternalsVisibleTo("SoundFingerprinting.FFT.FFTW.Tests")]
 
-[assembly: AssemblyVersion("9.4.0.101")]
-[assembly: AssemblyInformationalVersion("9.4.0.101")]
+[assembly: AssemblyVersion("9.4.2.100")]
+[assembly: AssemblyInformationalVersion("9.4.2.100")]
diff --git a/src/SoundFingerprinting/SoundFingerprinting.csproj b/src/SoundFingerprinting/SoundFingerprinting.csproj
index 3e726a41..2355ce2d 100644
--- a/src/SoundFingerprinting/SoundFingerprinting.csproj
+++ b/src/SoundFingerprinting/SoundFingerprinting.csproj
@@ -4,14 +4,14 @@
 	<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 	<GenerateAssemblyInfo>false</GenerateAssemblyInfo>
 	<Nullable>enable</Nullable>
-	<PackageVersion>9.4.0</PackageVersion>
+	<PackageVersion>9.4.2</PackageVersion>
 	<Authors>Sergiu Ciumac</Authors>
 	<PackageDescription>SoundFingerprinting is a C# framework that implements an efficient algorithm of audio fingerprinting and identification. Designed for developers, enthusiasts, researchers in the fields of audio processing, data mining, digital signal processing.</PackageDescription>
 	<PackageProjectUrl>https://github.com/addictedcs/soundfingerprinting</PackageProjectUrl>
 	<RepositoryUrl>https://github.com/AddictedCS/soundfingerprinting</RepositoryUrl>
 	<RepositoryType>git</RepositoryType>
 	<PackageReleaseNotes>
-		Version 9.4.0
+		Version 9.4.2
 		- Contains an important improvement to QueryCommand, allowing a much faster lookup for the use-cases when the track and the query are very long and almost identical.
 		- The improvement is rooted in the idea of returning Candidates from the IModelService instead of list of SubFingerprints. This provided knowledge on which hashed fingerprint matched with the query.
 		- To further improve the API design, methods related to the correct functioning of the QueryCommand were extracted into IQueryService interface (from which IModelService derives).