diff --git a/Cargo.lock b/Cargo.lock
index c2e54be..bd473a6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1245,6 +1245,7 @@ dependencies = [
  "rusqlite",
  "shellexpand",
  "symphonia 0.5.0",
+ "unidecode",
 ]
 
 [[package]]
@@ -2607,6 +2608,12 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
 
+[[package]]
+name = "unidecode"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "402bb19d8e03f1d1a7450e2bd613980869438e0666331be3e073089124aa1adc"
+
 [[package]]
 name = "utf8-ranges"
 version = "0.1.3"
diff --git a/mps-interpreter/Cargo.toml b/mps-interpreter/Cargo.toml
index 02df3b3..abaaec1 100644
--- a/mps-interpreter/Cargo.toml
+++ b/mps-interpreter/Cargo.toml
@@ -17,6 +17,7 @@ rand = { version = "0.8" }
 shellexpand = { version = "2", optional = true }
 bliss-audio-symphonia = { version = "0.4", optional = true, path = "../bliss-rs" }
 mpd = { version = "0.0.12", optional = true }
+unidecode = { version = "0.3.0", optional = true }
 
 [dev-dependencies]
 criterion = "0.3"
@@ -28,5 +29,5 @@ harness = false
 [features]
 default = [ "music_library", "ergonomics", "advanced" ]
 music_library = [ "symphonia", "mpd" ] # song metadata parsing and database auto-population
-ergonomics = ["shellexpand"] # niceties like ~ in pathes
+ergonomics = ["shellexpand", "unidecode"] # niceties like ~ in paths and unicode string sanitisation
 advanced = ["bliss-audio-symphonia"] # advanced language features like bliss playlist generation
diff --git a/mps-interpreter/src/lang/vocabulary/filters/field_like_filter.rs b/mps-interpreter/src/lang/vocabulary/filters/field_like_filter.rs
index a9639de..a140f65 100644
--- a/mps-interpreter/src/lang/vocabulary/filters/field_like_filter.rs
+++ b/mps-interpreter/src/lang/vocabulary/filters/field_like_filter.rs
@@ -2,7 +2,7 @@ use std::collections::VecDeque;
 use std::fmt::{Debug, Display, Error, Formatter};
 
 use super::field_filter::{FieldFilterErrorHandling, VariableOrValue};
-use crate::lang::utility::{assert_name, assert_token, assert_token_raw, check_name};
+use crate::lang::utility::{assert_token, assert_token_raw, check_name};
 use crate::lang::MpsLanguageDictionary;
 use crate::lang::MpsTypePrimitive;
 use crate::lang::{MpsFilterFactory, MpsFilterPredicate, MpsFilterStatementFactory};
@@ -17,11 +17,14 @@ pub struct FieldLikeFilter {
     field_name: String,
     field_errors: FieldFilterErrorHandling,
     val: VariableOrValue,
+    negate: bool,
 }
 
 impl FieldLikeFilter {
     fn sanitise_string(s: &str) -> String {
-        s.replace(|c: char| c.is_whitespace() || c == '_' || c == '-', " ")
+        #[cfg(feature = "unidecode")]
+        let s = unidecode::unidecode(s);
+        s.replace(|c: char| c.is_whitespace() || c == '_' || c == '-', "")
             .replace(|c: char| !(c.is_whitespace() || c.is_alphanumeric()), "")
             .to_lowercase()
     }
@@ -54,7 +57,12 @@ impl MpsFilterPredicate for FieldLikeFilter {
         if let Some(field) = music_item_lut.field(&self.field_name) {
             let field_str = Self::sanitise_string(&field.as_str());
             let var_str = Self::sanitise_string(variable);
-            Ok(field_str.contains(&var_str))
+            let matches = field_str.contains(&var_str);
+            if self.negate {
+                Ok(!matches)
+            } else {
+                Ok(matches)
+            }
         } else {
             match self.field_errors {
                 FieldFilterErrorHandling::Error => Err(RuntimeMsg(format!(
@@ -83,11 +91,11 @@ impl MpsFilterFactory<FieldLikeFilter> for FieldLikeFilterFactory {
         let tokens_len = tokens.len();
         (tokens_len >= 2 // field like variable
             && tokens[0].is_name()
-            && check_name("like", tokens[1]))
+            && (check_name("like", tokens[1]) || check_name("unlike", tokens[1])))
             || (tokens_len >= 3 // field? like variable OR field! like variable
             && tokens[0].is_name()
             && (tokens[1].is_interrogation() || tokens[1].is_exclamation())
-            && check_name("like", tokens[2]))
+            && (check_name("like", tokens[2]) || check_name("unlike", tokens[2])))
     }
 
     fn build_filter(
@@ -112,7 +120,21 @@ impl MpsFilterFactory<FieldLikeFilter> for FieldLikeFilterFactory {
         } else {
             FieldFilterErrorHandling::Error
         };
-        assert_name("like", tokens)?;
+        let name = assert_token(
+            |t| match t {
+                MpsToken::Name(s) => {
+                    match &s as _ {
+                        "unlike" | "like" => Some(s),
+                        _ => None,
+                    }
+                },
+                _ => None
+            },
+            MpsToken::Literal("like|unlike".into()),
+            tokens,
+        )?;
+        let is_negated = name == "unlike";
+        //assert_name("like", tokens)?;
         if tokens[0].is_literal() {
             let literal = assert_token(
                 |t| match t {
@@ -128,6 +150,7 @@ impl MpsFilterFactory<FieldLikeFilter> for FieldLikeFilterFactory {
                 field_name: field,
                 field_errors: error_handling,
                 val: value,
+                negate: is_negated,
             })
         } else {
             let variable = VariableOrValue::Variable(assert_token(
@@ -143,6 +166,7 @@ impl MpsFilterFactory<FieldLikeFilter> for FieldLikeFilterFactory {
                 field_name: field,
                 field_errors: FieldFilterErrorHandling::Error,
                 val: variable,
+                negate: is_negated,
             })
         }
     }
diff --git a/mps-interpreter/src/lib.rs b/mps-interpreter/src/lib.rs
index ae561e7..ffe0c3e 100644
--- a/mps-interpreter/src/lib.rs
+++ b/mps-interpreter/src/lib.rs
@@ -45,6 +45,8 @@
 //!
 //! ### field like something
 //!
+//! ### field unlike something
+//!
 //! ### field matches some_regex
 //!
 //! ### field != something
diff --git a/mps-interpreter/src/processing/music_analysis.rs b/mps-interpreter/src/processing/music_analysis.rs
index 278490c..f0393d8 100644
--- a/mps-interpreter/src/processing/music_analysis.rs
+++ b/mps-interpreter/src/processing/music_analysis.rs
@@ -78,7 +78,18 @@ impl MpsDefaultAnalyzer {
     fn get_path(item: &MpsItem) -> Result<&str, RuntimeMsg> {
         if let Some(path) = item.field(PATH_FIELD) {
             if let MpsTypePrimitive::String(path) = path {
-                Ok(path)
+                if path.starts_with("file://") {
+                    //println!("path guess: `{}`", path.get(7..).unwrap());
+                    Ok(path.get(7..).unwrap())
+                } else if !path.contains("://") {
+                    Ok(path)
+                } else {
+                    Err(RuntimeMsg(format!(
+                        "Field {} on item is not a supported URI, it's {}",
+                        PATH_FIELD, path
+                    )))
+                }
+
             } else {
                 Err(RuntimeMsg(format!(
                     "Field {} on item is not String, it's {}",
@@ -116,17 +127,25 @@ impl MpsMusicAnalyzer for MpsDefaultAnalyzer {
         let path_from = Self::get_path(from)?;
         let path_to = Self::get_path(to)?;
         for response in self.responses.iter() {
-            if let ResponseType::Distance {
-                path1,
-                path2,
-                distance,
-            } = response
-            {
-                if path1 == path_from && path2 == path_to {
-                    return match distance {
-                        Ok(d) => Ok(d as f64),
-                        Err(e) => Err(RuntimeMsg(format!("Bliss error: {}", e))),
-                    };
+            match response {
+                ResponseType::Distance {
+                    path1,
+                    path2,
+                    distance,
+                } => {
+                    //println!("Got distance from `{}` to `{}`: {}", path1, path2, distance.as_ref().ok().unwrap_or(&f32::INFINITY));
+                    if path1 == path_from && path2 == path_to {
+                        return match distance {
+                            Ok(d) => Ok(d as f64),
+                            Err(e) => Err(RuntimeMsg(format!("Bliss error: {}", e))),
+                        };
+                    }
+                }
+                ResponseType::Song { .. } => {},
+                ResponseType::UnsupportedSong { path, msg } => {
+                    if path == path_to || path == path_from {
+                        return Err(RuntimeMsg(format!("Bliss error: {}", msg)));
+                    }
                 }
             }
         }
@@ -191,6 +210,10 @@ enum ResponseType {
         path: String,
         song: Result<Song, BlissError>,
     },
+    UnsupportedSong {
+        path: String,
+        msg: String,
+    }
 }
 
 #[cfg(feature = "bliss-audio-symphonia")]
@@ -225,10 +248,11 @@ impl CacheThread {
                     distance,
                 } => {
                     self.insert_distance(path1, path2, distance);
-                }
+                },
                 ResponseType::Song { path, song } => {
                     self.insert_song(path, song);
-                }
+                },
+                ResponseType::UnsupportedSong { .. } => {},
             }
         }
     }
@@ -285,6 +309,12 @@ impl CacheThread {
                         } else {
                             self.insert_song(path2, song);
                         }
+                    },
+                    ResponseType::UnsupportedSong {path: unsupported_path, ..} => {
+                        self.song_in_progress.remove(&unsupported_path);
+                        if path == unsupported_path {
+                            return None;
+                        }
                     }
                 }
             }
@@ -358,12 +388,18 @@ impl CacheThread {
                                 distance,
                             } => {
                                 self.insert_distance(path1, path2, distance);
-                            }
+                            },
                             ResponseType::Song { path: path2, song } => {
                                 self.insert_song(path2.clone(), song.clone());
                                 if self.song_in_progress.len() <= available_parallelism {
                                     break 'inner4;
                                 }
+                            },
+                            ResponseType::UnsupportedSong {path: unsupported_path, ..} => {
+                                self.song_in_progress.remove(&unsupported_path);
+                                if self.song_in_progress.len() <= available_parallelism {
+                                    break 'inner4;
+                                }
                             }
                         }
                     }
@@ -409,6 +445,18 @@ impl CacheThread {
                         }
                         ResponseType::Song { path, song } => {
                             self.insert_song(path, song);
+                        },
+                        ResponseType::UnsupportedSong { path: unsupported_path, msg } => {
+                            self.song_in_progress.remove(&unsupported_path);
+                            if let Err(_) = self.responses.send(ResponseType::UnsupportedSong {
+                                path: unsupported_path.clone(),
+                                msg: msg
+                            }) {
+                                return true;
+                            }
+                            if unsupported_path == key.0 || unsupported_path == key.1 {
+                                break 'inner1;
+                            }
                         }
                     }
                 }
@@ -424,6 +472,20 @@ impl CacheThread {
         worker_tx: &Sender<ResponseType>,
         worker_results: &Receiver<ResponseType>,
     ) -> bool {
+        let path = if path.starts_with("file://") {
+            //println!("path guess: `{}`", path.get(7..).unwrap());
+            path.get(7..).unwrap().to_owned()
+        } else if !path.contains("://") {
+            path
+        } else {
+            if let Err(_) = self.responses.send(ResponseType::UnsupportedSong {
+                msg: format!("Song path is not a supported URI, it's `{}`", path),
+                path: path,
+            }) {
+                return true;
+            }
+            return false;
+        };
         if let Some(song) = self.song_cache.get(&path) {
             if ack {
                 let song = song.to_owned();
@@ -460,6 +522,12 @@ impl CacheThread {
                                 if self.song_in_progress.len() <= available_parallelism {
                                     break 'inner2;
                                 }
+                            },
+                            ResponseType::UnsupportedSong { path, .. } => {
+                                self.song_in_progress.remove(&path);
+                                if self.song_in_progress.len() <= available_parallelism {
+                                    break 'inner2;
+                                }
                             }
                         }
                     }
@@ -493,7 +561,19 @@ impl CacheThread {
                                     path: path,
                                     song: song,
                                 }) {
-                                    return false;
+                                    return true;
+                                }
+                                break 'inner3;
+                            }
+                        }
+                        ResponseType::UnsupportedSong { path: unsupported_path, msg } => {
+                            self.song_in_progress.remove(&unsupported_path);
+                            if unsupported_path == path {
+                                if let Err(_) = self.responses.send(ResponseType::UnsupportedSong {
+                                    path: unsupported_path,
+                                    msg: msg
+                                }) {
+                                    return true;
                                 }
                                 break 'inner3;
                             }
diff --git a/mps-interpreter/tests/single_line.rs b/mps-interpreter/tests/single_line.rs
index 8dedc2a..468cbb6 100644
--- a/mps-interpreter/tests/single_line.rs
+++ b/mps-interpreter/tests/single_line.rs
@@ -350,6 +350,11 @@ fn execute_likefilter_line() -> Result<(), MpsError> {
         "files(`~/Music/MusicFlac/Bruno Mars/24K Magic/`).(album like `24K Magic`)",
         false,
         true,
+    )?;
+    execute_single_line(
+        "files(`~/Music/MusicFlac/Bruno Mars/24K Magic/`).(album unlike `24K Magic`)",
+        true,
+        true,
     )
 }
 
diff --git a/src/help.rs b/src/help.rs
index 2576e74..d06b739 100644
--- a/src/help.rs
+++ b/src/help.rs
@@ -61,6 +61,7 @@ Operations to reduce the items in an iterable: iterable.(filter)
 
  field == something
  field like something
+ field unlike something
  field matches some_regex
  field != something
  field >= something