diff --git a/Project.toml b/Project.toml
index ed6c029fc1f31d933f81fc25205acbe15c40ed71..71b423d92d3fd26ed477a4fa3c8250bba8a0b72d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "SpeechDatasets"
 uuid = "ae813453-fab8-46d9-ab8f-a64c05464021"
 authors = ["Lucas ONDEL YANG <lucas.ondel@cnrs.fr>", "Simon DEVAUCHELLE <simon.devauchelle@universite-paris-saclay.fr>", "Nicolas DENIER <nicolas.denier@cnrs.fr>", "Remi URO <uro@lisn.fr>"]
-version = "0.21.0"
+version = "0.21.1"
 
 [deps]
 AudioSources = "09fc2aa8-47ce-428a-ad90-e701fa7ea67f"
diff --git a/src/corpora/synthetic_vowel_dataset.jl b/src/corpora/synthetic_vowel_dataset.jl
index fe19e7afa3cf5bc0c32584442d55205657b7fdff..90c7c5c62f4cffb86cb5c9b240cec94780cf63d9 100644
--- a/src/corpora/synthetic_vowel_dataset.jl
+++ b/src/corpora/synthetic_vowel_dataset.jl
@@ -44,12 +44,12 @@ function synset_recordings(dir::AbstractString)
 
             ext != ".wav" && continue
 
-            spk = join(sname[1:3], "_")
+            spkid = sname[3]
             gender, vowel, sigid = sname[4], sname[5], sname[6]
 
             path = joinpath(root, file)
 
-            id = "$(spk)_$(gender)_$(vowel)_$(sigid)"
+            id = "spk_$(spkid)_$(gender)_$(vowel)_$(sigid)"
 
             audio_src = AudioSources.FileAudioSource(path)
 
@@ -79,7 +79,8 @@ function synset_metadata(dir)
     for row in eachrow(df)
 
         # Get metadata
-        spk = row["fname"]
+        spk = split(row["fname"], "_")
+        spkid = spk[3] 
         gender = row["gender"]
         vowel = row["vowel"]
         sigid = split(row["signal"], "_")[end]
@@ -90,7 +91,7 @@ function synset_metadata(dir)
         angles = Dict(["θ$i" => row["θ$i"] for i in 1:Int(countfilter/2)])
         magnitudes = Dict(["r$i" => row["r$i"] for i in 1:Int(countfilter/2)])
 
-        id = "$(spk)_$(gender)_$(vowel)_$(sigid)"
+        id = "spk_$(spkid)_$(gender)_$(vowel)_$(sigid)"
         metadata[id] = Annotation(
             id,  # recording id and annotation id are the same since we have
             id,  # a one-to-one mapping
@@ -98,7 +99,7 @@ function synset_metadata(dir)
             -1,  # recording
             [1], # only 1 channel (mono recording)
             Dict(
-                    "spk" => spk,
+                    "spk" => spkid,
                     "gender" => gender,
                     "vowel" => vowel,
                     "sigid" => sigid,