diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
index 9cd188cd9f..b77838951f 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
@@ -964,7 +964,7 @@ class Account(
         mimeType: String?,
         hash: String,
         duration: Int,
-        waveform: List<Int>,
+        waveform: List<Float>,
     ) {
         signAndComputeBroadcast(VoiceEvent.build(url, mimeType, hash, duration, waveform))
     }
@@ -974,7 +974,7 @@ class Account(
         mimeType: String?,
         hash: String,
         duration: Int,
-        waveform: List<Int>,
+        waveform: List<Float>,
         replyTo: EventHintBundle<VoiceEvent>,
     ) {
         signAndComputeBroadcast(VoiceReplyEvent.build(url, mimeType, hash, duration, waveform, replyTo))
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/VideoView.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/VideoView.kt
index 8b31f98922..ea0b3dd99d 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/VideoView.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/VideoView.kt
@@ -47,7 +47,7 @@ import com.vitorpamplona.quartz.nip94FileMetadata.tags.DimensionTag
 
 @Immutable
 class WaveformData(
-    val wave: List<Int>,
+    val wave: List<Float>,
 )
 
 @Composable
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/uploads/VoiceMessageRecorder.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/uploads/VoiceMessageRecorder.kt
index ba98a19c45..750251cbe8 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/uploads/VoiceMessageRecorder.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/uploads/VoiceMessageRecorder.kt
@@ -35,7 +35,7 @@ import java.io.File
 class RecordingResult(
     val file: File,
     val mimeType: String,
-    val amplitudes: List<Int>,
+    val amplitudes: List<Float>,
     val duration: Int,
 )
 
@@ -44,7 +44,7 @@ class VoiceMessageRecorder {
     private var outputFile: File? = null
     private var startTime: Long = 0
     private var job: Job? = null
-    private var amplitudes: MutableList<Int> = mutableListOf()
+    private var amplitudes: MutableList<Float> = mutableListOf()
 
     private fun createRecorder(context: Context): MediaRecorder =
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
@@ -80,7 +80,7 @@ class VoiceMessageRecorder {
         job =
             scope.launch {
                 while (recorder != null) {
-                    amplitudes.add(((recorder?.maxAmplitude ?: 0) / 100).toInt())
+                    amplitudes.add(recorder?.maxAmplitude?.toFloat() ?: 0f)
                     delay(1000)
                 }
             }
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/AudioWaveformReadOnly.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/AudioWaveformReadOnly.kt
index 330dd51b20..b3f2c667e6 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/AudioWaveformReadOnly.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/AudioWaveformReadOnly.kt
@@ -20,6 +20,8 @@
  */
 package com.vitorpamplona.amethyst.ui.components
 
+import android.R.attr.maxHeight
+import android.R.attr.minHeight
 import androidx.compose.animation.core.AnimationSpec
 import androidx.compose.animation.core.animateFloatAsState
 import androidx.compose.animation.core.tween
@@ -48,6 +50,7 @@ import androidx.compose.ui.unit.coerceIn
 import androidx.compose.ui.unit.dp
 import com.linc.audiowaveform.model.AmplitudeType
 import com.linc.audiowaveform.model.WaveformAlignment
+import com.vitorpamplona.amethyst.ui.components.toDrawableAmplitudes
 import kotlin.math.ceil
 import kotlin.math.roundToInt
 
@@ -77,7 +80,7 @@ fun AudioWaveformReadOnly(
     spikeRadius: Dp = 2.dp,
     spikePadding: Dp = 2.dp,
     progress: Float = 0F,
-    amplitudes: List<Int>,
+    amplitudes: List<Float>,
     onProgressChange: (Float) -> Unit,
 ) {
     val backgroundColor = MaterialTheme.colorScheme.background
@@ -101,6 +104,7 @@ fun AudioWaveformReadOnly(
                 maxHeight = canvasSize.height.coerceAtLeast(MIN_SPIKE_HEIGHT),
             )
         }.map { animateFloatAsState(it, spikeAnimationSpec).value }
+
     Canvas(
         modifier =
             Modifier
@@ -145,14 +149,13 @@ fun AudioWaveformReadOnly(
     }
 }
 
-private fun List<Int>.toDrawableAmplitudes(
+private fun List<Float>.toDrawableAmplitudes(
     amplitudeType: AmplitudeType,
     spikes: Int,
     minHeight: Float,
     maxHeight: Float,
 ): List<Float> {
-    val amplitudes = map(Int::toFloat)
-    if (amplitudes.isEmpty() || spikes == 0) {
+    if (this.isEmpty() || spikes == 0) {
         return List(spikes) { minHeight }
     }
     val transform = { data: List<Float> ->
@@ -161,11 +164,10 @@ private fun List<Int>.toDrawableAmplitudes(
             AmplitudeType.Max -> data.max()
             AmplitudeType.Min -> data.min()
         }.toFloat()
-            .coerceIn(minHeight, maxHeight)
     }
     return when {
-        spikes > amplitudes.count() -> amplitudes.fillToSize(spikes, transform)
-        else -> amplitudes.chunkToSize(spikes, transform)
+        spikes > this.count() -> this.fillToSize(spikes, transform)
+        else -> this.chunkToSize(spikes, transform)
     }.normalize(minHeight, maxHeight)
 }
 
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/AudioHeaderEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/AudioHeaderEvent.kt
index 6173346971..dde8b8b3f7 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/AudioHeaderEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/AudioHeaderEvent.kt
@@ -54,7 +54,7 @@ class AudioHeaderEvent(
             description: String,
             downloadUrl: String,
             streamUrl: String? = null,
-            wavefront: List<Int>? = null,
+            wavefront: List<Float>? = null,
             createdAt: Long = TimeUtils.now(),
             initializer: TagArrayBuilder<AudioHeaderEvent>.() -> Unit = {},
         ) = eventTemplate(KIND, description, createdAt) {
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/TagArrayBuilderExt.kt b/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/TagArrayBuilderExt.kt
index 5dbaaf522b..d41bdf1723 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/TagArrayBuilderExt.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/TagArrayBuilderExt.kt
@@ -29,4 +29,4 @@ fun TagArrayBuilder<AudioHeaderEvent>.downloadUrl(downloadUrlTag: String) = addU
 
 fun TagArrayBuilder<AudioHeaderEvent>.streamUrl(streamUrl: String) = addUnique(StreamUrlTag.assemble(streamUrl))
 
-fun TagArrayBuilder<AudioHeaderEvent>.wavefront(wave: List<Int>) = addUnique(WaveformTag.assemble(wave))
+fun TagArrayBuilder<AudioHeaderEvent>.wavefront(wave: List<Float>) = addUnique(WaveformTag.assemble(wave))
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/tags/WaveformTag.kt b/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/tags/WaveformTag.kt
index 7813f78b92..fc383cdc75 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/tags/WaveformTag.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/experimental/audio/header/tags/WaveformTag.kt
@@ -26,7 +26,7 @@ import com.vitorpamplona.quartz.nip01Core.jackson.JsonMapper
 import com.vitorpamplona.quartz.utils.ensure
 
 class WaveformTag(
-    val wave: List<Int>,
+    val wave: List<Float>,
 ) {
     fun toTagArray() = assemble(wave)
 
@@ -38,12 +38,12 @@ class WaveformTag(
             ensure(tag.has(1)) { return null }
             ensure(tag[0] == TAG_NAME) { return null }
             ensure(tag[1].isNotEmpty()) { return null }
-            val wave = runCatching { JsonMapper.mapper.readValue<List<Int>>(tag[1]) }.getOrNull()
+            val wave = runCatching { JsonMapper.mapper.readValue<List<Float>>(tag[1]) }.getOrNull()
             if (wave.isNullOrEmpty()) return null
             return WaveformTag(wave)
         }
 
         @JvmStatic
-        fun assemble(wave: List<Int>) = arrayOf(TAG_NAME, JsonMapper.mapper.writeValueAsString(wave))
+        fun assemble(wave: List<Float>) = arrayOf(TAG_NAME, JsonMapper.mapper.writeValueAsString(wave))
     }
 }
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/AudioMeta.kt b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/AudioMeta.kt
index 8d035e7206..d74160cccf 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/AudioMeta.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/AudioMeta.kt
@@ -29,7 +29,7 @@ data class AudioMeta(
     val mimeType: String? = null,
     val hash: String? = null,
     val duration: Int? = null,
-    val waveform: List<Int>? = null,
+    val waveform: List<Float>? = null,
 ) {
     fun toIMetaArray(): Array<String> =
         IMetaTagBuilder(url)
@@ -37,7 +37,7 @@ data class AudioMeta(
                 mimeType?.let { mimeType(it) }
                 hash?.let { hash(it) }
                 duration?.let { duration(it) }
-                waveform?.let { waveform(it) }
+                waveform?.let { waveformFloat(it) }
             }.build()
             .toTagArray()
 
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/IMetaTagBuilderExt.kt b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/IMetaTagBuilderExt.kt
index 4562d52754..25da88f798 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/IMetaTagBuilderExt.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/IMetaTagBuilderExt.kt
@@ -34,6 +34,8 @@ fun IMetaTagBuilder.hash(hash: HexKey) = add(HashSha256Tag.TAG_NAME, hash)
 
 fun IMetaTagBuilder.duration(size: Int) = add(DurationTag.TAG_NAME, size.toString())
 
-fun IMetaTagBuilder.waveform(wave: List<Int>) = add(WaveformTag.TAG_NAME, WaveformTag.assembleWave(wave))
+fun IMetaTagBuilder.waveformInt(wave: List<Int>) = add(WaveformTag.TAG_NAME, WaveformTag.assembleWaveInt(wave))
+
+fun IMetaTagBuilder.waveformFloat(wave: List<Float>) = add(WaveformTag.TAG_NAME, WaveformTag.assembleWaveFloat(wave))
 
 fun IMetaTagBuilder.mimeType(mime: String) = add(MimeTypeTag.TAG_NAME, mime)
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/TagArrayBuilderExt.kt b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/TagArrayBuilderExt.kt
index f482eb2019..42352f12d9 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/TagArrayBuilderExt.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/TagArrayBuilderExt.kt
@@ -33,7 +33,7 @@ fun <T : BaseVoiceEvent> TagArrayBuilder<T>.audioIMeta(
     mimeType: String? = null,
     hash: String? = null,
     duration: Int? = null,
-    waveform: List<Int>? = null,
+    waveform: List<Float>? = null,
 ) = audioIMeta(AudioMeta(url, mimeType, hash, duration, waveform))
 
 fun <T : BaseVoiceEvent> TagArrayBuilder<T>.audioIMeta(imeta: AudioMeta): TagArrayBuilder<T> {
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/VoiceEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/VoiceEvent.kt
index 33f30d596f..60d94c44c8 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/VoiceEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/VoiceEvent.kt
@@ -43,7 +43,7 @@ class VoiceEvent(
             mimeType: String?,
             hash: String,
             duration: Int,
-            waveform: List<Int>,
+            waveform: List<Float>,
         ) = build(AudioMeta(url, mimeType, hash, duration, waveform))
 
         fun build(
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/VoiceReplyEvent.kt b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/VoiceReplyEvent.kt
index eb7444881d..2b064deb31 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/VoiceReplyEvent.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/VoiceReplyEvent.kt
@@ -64,7 +64,7 @@ class VoiceReplyEvent(
             mimeType: String?,
             hash: String,
             duration: Int,
-            waveform: List<Int>,
+            waveform: List<Float>,
             replyingTo: EventHintBundle<VoiceEvent>,
         ) = build(AudioMeta(url, mimeType, hash, duration, waveform), replyingTo)
 
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/tags/WaveformTag.kt b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/tags/WaveformTag.kt
index d4366fcba5..a05d9a5a2c 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/tags/WaveformTag.kt
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/nipA0VoiceMessages/tags/WaveformTag.kt
@@ -22,11 +22,12 @@ package com.vitorpamplona.quartz.nipA0VoiceMessages.tags
 
 import com.vitorpamplona.quartz.nip01Core.core.has
 import com.vitorpamplona.quartz.utils.ensure
+import kotlin.collections.joinToString
 
 class WaveformTag(
-    val wave: List<Int>,
+    val wave: List<Float>,
 ) {
-    fun toTagArray() = assemble(wave)
+    fun toTagArray() = assembleFloat(wave)
 
     companion object {
         const val TAG_NAME = "waveform"
@@ -35,26 +36,32 @@ class WaveformTag(
         fun parse(tag: Array<String>): WaveformTag? = parseWave(tag)?.let { WaveformTag(it) }
 
         @JvmStatic
-        fun parseWave(tag: Array<String>): List<Int>? {
+        fun parseWave(tag: Array<String>): List<Float>? {
             ensure(tag.has(1)) { return null }
             ensure(tag[0] == TAG_NAME) { return null }
             ensure(tag[1].isNotEmpty()) { return null }
 
-            val wave = tag[1].split(" ").mapNotNull { it.toIntOrNull() }
+            val wave = tag[1].split(" ").mapNotNull { it.toFloatOrNull() }
             if (wave.isEmpty()) return null
             return wave
         }
 
-        fun parseWave(wave: String): List<Int>? {
-            val wave = wave.split(" ").mapNotNull { it.toIntOrNull() }
+        fun parseWave(wave: String): List<Float>? {
+            val wave = wave.split(" ").mapNotNull { it.toFloatOrNull() }
             if (wave.isEmpty()) return null
             return wave
         }
 
         @JvmStatic
-        fun assembleWave(wave: List<Int>) = wave.joinToString(" ")
+        fun assembleWaveInt(wave: List<Int>) = wave.joinToString(" ")
 
         @JvmStatic
-        fun assemble(wave: List<Int>) = arrayOf(TAG_NAME, assembleWave(wave))
+        fun assembleInt(wave: List<Int>) = arrayOf(TAG_NAME, assembleWaveInt(wave))
+
+        @JvmStatic
+        fun assembleWaveFloat(wave: List<Float>) = wave.joinToString(" ")
+
+        @JvmStatic
+        fun assembleFloat(wave: List<Float>) = arrayOf(TAG_NAME, assembleWaveFloat(wave))
     }
 }