diff --git a/README.md b/README.md
index f1e9645..449196d 100644
--- a/README.md
+++ b/README.md
@@ -78,7 +78,7 @@ platform path implementation.
 ## Configuration
 
 Important configuration keys are created automatically in `.flac-48khz-manager.ini`.
-The same file is used by both managers.
+The same file is used by both managers. The implementation now reads this file as a simple-ini value directly; there is no separate configuration struct layered on top of the ini model.
 
 ```ini
 [manager]
@@ -90,6 +90,9 @@ display-log=#t
 log-file=".flac-48khz-manager.log"
 compression-level=5
 
+[opus-manager]
+log-file=".flac2opus-manager.log"
+
 [mail]
 enabled=#f
 send-on-success=#f
diff --git a/flac-48khz-manager.rkt b/flac-48khz-manager.rkt
index 3c946ba..3839f4c 100644
--- a/flac-48khz-manager.rkt
+++ b/flac-48khz-manager.rkt
@@ -5,7 +5,7 @@
          racket/list
          racket/path
          "private/audio.rkt"
-         "private/config.rkt"
+         "private/manager-ini.rkt"
          "private/convert-place.rkt"
          "private/cover-art.rkt"
          "private/fingerprint.rkt"
@@ -35,13 +35,11 @@
        (equal? (alist-ref/default old 'signature #f) signature)
        (not (equal? (alist-ref/default old 'status #f) 'error))))
 
-(define (file-signature path config fingerprint-proc)
-  (define mode (manager-config-change-detection config))
+(define (file-signature path ini fingerprint-proc)
+  (define mode (string-downcase (ini-ref/string ini 'manager 'change-detection "flac-taglib")))
+  (define hash-algorithm (string-downcase (ini-ref/string ini 'manager 'hash-algorithm "sha256")))
   (cond [(member mode '("hash" "sha256" "full-hash" "full-sha256"))
-         (string-append "file:"
-                        (manager-config-hash-algorithm config)
-                        ":"
-                        (file-digest path (manager-config-hash-algorithm config)))]
+         (string-append "file:" hash-algorithm ":" (file-digest path hash-algorithm))]
         [(member mode '("mtime-size" "quick"))
          (format "mtime-size:~a:~a" (file-size path) (file-or-directory-modify-seconds path))]
         [(member mode '("flac" "flac-streaminfo"))
@@ -66,7 +64,7 @@
     (when cover (info-alm "embedded sidecar cover in ~a from ~a" relpath cover))
     cover))
 
-(define (process-one-file ks config path relpath inspect-flac-proc fingerprint-proc convert-proc summary errors)
+(define (process-one-file ks ini path relpath inspect-flac-proc fingerprint-proc convert-proc summary errors)
   ;; Only invokes TagLib when a sidecar cover/folder image exists in the same directory.
   ;; This keeps the cheap mtime/size fast path cheap for most directories, but still
   ;; lets the manager repair missing embedded artwork before fingerprinting.
@@ -90,25 +88,25 @@
                                                 (cons 'message (exn-message e)))
                                           errors)))])
            (define sample-rate (inspect-flac-proc path))
-           (define signature (file-signature path config fingerprint-proc))
+           (define signature (file-signature path ini fingerprint-proc))
            (cond [(same-signature-state? old signature)
                   (info-alm "unchanged fingerprint: ~a" relpath)
                   (state-set-file! ks relpath (state-info path signature 'unchanged sample-rate '()))
                   (values (summary-inc summary2 'unchanged) errors)]
-                 [(> sample-rate (manager-config-max-sample-rate config))
-                  (if (manager-config-dry-run? config)
+                 [(> sample-rate (ini-ref/int ini 'manager 'max-sample-rate 48000))
+                  (if (ini-ref/bool ini 'manager 'dry-run #f)
                       (begin
-                        (warn-alm "dry-run: would convert ~a from ~a Hz to ~a Hz" relpath sample-rate (manager-config-max-sample-rate config))
+                        (warn-alm "dry-run: would convert ~a from ~a Hz to ~a Hz" relpath sample-rate (ini-ref/int ini 'manager 'max-sample-rate 48000))
                         (state-set-file! ks relpath
                                          (state-info path signature 'dry-run sample-rate '()))
                         (values (summary-inc (summary-inc summary2 'skipped) 'dry-run) errors))
                       (begin
-                        (info-alm "converting ~a from ~a Hz to ~a Hz" relpath sample-rate (manager-config-max-sample-rate config))
+                        (info-alm "converting ~a from ~a Hz to ~a Hz" relpath sample-rate (ini-ref/int ini 'manager 'max-sample-rate 48000))
                         (let* ((result (convert-proc path
-                                                     (manager-config-max-sample-rate config)
-                                                     (manager-config-compression-level config)))
+                                                     (ini-ref/int ini 'manager 'max-sample-rate 48000)
+                                                     (ini-ref/int ini 'manager 'compression-level 5)))
                                (new-sample-rate (inspect-flac-proc path))
-                               (new-signature (file-signature path config fingerprint-proc)))
+                               (new-signature (file-signature path ini fingerprint-proc)))
                           (state-set-file! ks relpath
                                            (state-info path new-signature 'converted new-sample-rate
                                                        (list (cons 'old-sample-rate sample-rate)
@@ -136,22 +134,25 @@
   (define base-dir (filesystem-path base-directory))
   (unless (directory-exists? base-dir)
     (raise-argument-error 'manage-flac-tree "existing directory" base-directory))
-  (define config (load-manager-config base-dir))
-  (setup-logging! (manager-config-log-file config) (manager-config-display-log? config))
+  (define ini-file (manager-ini-file base-dir))
+  (define state-file (manager-state-file base-dir))
+  (define ini (load-manager-ini base-dir))
+  (setup-logging! (ini-ref/path ini base-dir 'manager 'log-file ".flac-48khz-manager.log")
+                  (ini-ref/bool ini 'manager 'display-log #t))
   (info-alm "base directory: ~a" base-dir)
-  (info-alm "state file: ~a" (manager-config-state-file config))
-  (info-alm "ini file: ~a" (manager-config-ini-file config))
-  (info-alm "change detection: ~a" (manager-config-change-detection config))
-  (define ks (open-manager-state (manager-config-state-file config)))
+  (info-alm "state file: ~a" state-file)
+  (info-alm "ini file: ~a" ini-file)
+  (info-alm "change detection: ~a" (ini-ref/string ini 'manager 'change-detection "flac-taglib"))
+  (define ks (open-manager-state state-file))
   (define files (find-flac-files base-dir))
   (define relpaths (map (lambda (p) (relpath-string base-dir p)) files))
   (define summary0 (drop-removed! ks relpaths (make-empty-summary)))
   (define-values (summary errors)
     (for/fold ([summary summary0] [errors '()]) ([p (in-list files)] [rel (in-list relpaths)])
-      (process-one-file ks config p rel inspect-flac-proc fingerprint-proc convert-proc summary errors)))
+      (process-one-file ks ini p rel inspect-flac-proc fingerprint-proc convert-proc summary errors)))
   (define errors* (reverse errors))
   (with-handlers ([exn:fail? (lambda (e) (err-alm "mail report failed: ~a" (exn-message e)) (void))])
-    (maybe-send-report-mail config summary errors*))
+    (maybe-send-report-mail ini summary errors*))
   (for ([line (in-list (summary->lines summary))]) (info-alm "summary: ~a" line))
   summary)
 
diff --git a/flac2opus-manager.rkt b/flac2opus-manager.rkt
index be736a3..6897f3b 100644
--- a/flac2opus-manager.rkt
+++ b/flac2opus-manager.rkt
@@ -4,7 +4,7 @@
          racket/file
          racket/list
          racket/path
-         "private/config.rkt"
+         "private/manager-ini.rkt"
          "private/flac2opus-state.rkt"
          "private/fingerprint.rkt"
          "private/hash.rkt"
@@ -26,11 +26,11 @@
 (define (manager-admin-relpath? relpath)
   (member relpath manager-admin-relpaths))
 
-(define (source-file-signature path config)
-  (define mode (manager-config-change-detection config))
+(define (source-file-signature path ini)
+  (define mode (string-downcase (ini-ref/string ini 'manager 'change-detection "flac-taglib")))
+  (define hash-algorithm (string-downcase (ini-ref/string ini 'manager 'hash-algorithm "sha256")))
   (cond [(member mode '("hash" "sha256" "full-hash" "full-sha256"))
-         (string-append "file:" (manager-config-hash-algorithm config) ":"
-                        (file-digest path (manager-config-hash-algorithm config)))]
+         (string-append "file:" hash-algorithm ":" (file-digest path hash-algorithm))]
         [(flac-path? path)
          (cond [(member mode '("flac" "flac-streaminfo"))
                 (string-append "flac-streaminfo:" (flac-streaminfo-fingerprint path))]
@@ -103,7 +103,7 @@
                 (cons 'kbps kbps))
           extra))
 
-(define (process-one-source-file ks config target-dir path relpath target-relpath kbps convert-proc summary errors)
+(define (process-one-source-file ks ini target-dir path relpath target-relpath kbps convert-proc summary errors)
   (define target-path (target-path-for target-dir target-relpath))
   (define old (flac2opus-state-get-file ks relpath #f))
   (cond [(same-quick-state? old path target-path target-relpath kbps)
@@ -125,13 +125,13 @@
                                     (cons (list (cons 'file relpath)
                                                 (cons 'message (exn-message e)))
                                           errors)))])
-           (define signature (source-file-signature path config))
+           (define signature (source-file-signature path ini))
            (cond [(same-signature-state? old signature target-path target-relpath kbps)
                   (info-alm "unchanged fingerprint: ~a" relpath)
                   (flac2opus-state-set-file! ks relpath
                                              (state-info path target-relpath signature 'unchanged kbps '()))
                   (values (summary-inc summary2 'unchanged) errors)]
-                 [(manager-config-dry-run? config)
+                 [(ini-ref/bool ini 'manager 'dry-run #f)
                   (warn-alm "dry-run: would mirror ~a -> ~a" relpath target-relpath)
                   (flac2opus-state-set-file! ks relpath
                                              (state-info path target-relpath signature 'dry-run kbps '()))
@@ -181,15 +181,18 @@
   (unless (directory-exists? source-dir)
     (raise-argument-error 'manage-flac2opus-tree "existing source directory" source-directory))
   (make-directory* target-dir)
-  (define config (load-manager-config source-dir))
-  (setup-logging! (manager-config-log-file-opus config) (manager-config-display-log? config))
+  (define ini-file (manager-ini-file source-dir))
+  (define state-file (manager-state-file source-dir))
+  (define ini (load-manager-ini source-dir))
+  (setup-logging! (ini-ref/path ini source-dir 'opus-manager 'log-file ".flac2opus-manager.log")
+                  (ini-ref/bool ini 'manager 'display-log #t))
   (info-alm "flac2opus source directory: ~a" source-dir)
   (info-alm "flac2opus target directory: ~a" target-dir)
-  (info-alm "state file: ~a" (manager-config-state-file config))
-  (info-alm "ini file: ~a" (manager-config-ini-file config))
-  (info-alm "change detection: ~a" (manager-config-change-detection config))
+  (info-alm "state file: ~a" state-file)
+  (info-alm "ini file: ~a" ini-file)
+  (info-alm "change detection: ~a" (ini-ref/string ini 'manager 'change-detection "flac-taglib"))
   (info-alm "opus bitrate: ~a kbps" kbps)
-  (define ks (open-flac2opus-state (manager-config-state-file config)))
+  (define ks (open-flac2opus-state state-file))
   (define files (find-source-files source-dir))
   (define relpaths (map (lambda (p) (source-relpath-string source-dir p)) files))
   (define target-relpaths (map target-relpath-for relpaths))
@@ -198,10 +201,10 @@
     (for/fold ([summary summary0] [errors '()]) ([p (in-list files)]
                                                   [relpath (in-list relpaths)]
                                                   [target-relpath (in-list target-relpaths)])
-      (process-one-source-file ks config target-dir p relpath target-relpath kbps convert-proc summary errors)))
+      (process-one-source-file ks ini target-dir p relpath target-relpath kbps convert-proc summary errors)))
   (define errors* (reverse errors))
   (with-handlers ([exn:fail? (lambda (e) (err-alm "mail report failed: ~a" (exn-message e)) (void))])
-    (maybe-send-report-mail config summary errors*
+    (maybe-send-report-mail ini summary errors*
                             #:manager-name "FLAC to Opus manager"
                             #:result-label "converted/copied"))
   (for ([line (in-list (summary->lines summary))]) (info-alm "summary: ~a" line))
diff --git a/private/config.rkt b/private/config.rkt
deleted file mode 100644
index 02862c6..0000000
--- a/private/config.rkt
+++ /dev/null
@@ -1,110 +0,0 @@
-#lang racket/base
-
-(require racket/file
-         racket/path
-         simple-ini
-         "util.rkt")
-
-(provide manager-config?
-         manager-config-base-dir
-         manager-config-ini-file
-         manager-config-state-file
-         manager-config-log-file
-	 manager-config-log-file-opus
-         manager-config-max-sample-rate
-         manager-config-hash-algorithm
-         manager-config-change-detection
-         manager-config-dry-run?
-         manager-config-display-log?
-         manager-config-compression-level
-         manager-config-mail-enabled?
-         manager-config-mail-send-on-success?
-         manager-config-mail-send-on-error?
-         manager-config-mail-host
-         manager-config-mail-port
-         manager-config-mail-tls?
-         manager-config-mail-username
-         manager-config-mail-password
-         manager-config-mail-from
-         manager-config-mail-to
-         manager-config-mail-cc
-         manager-config-mail-bcc
-         manager-config-mail-subject-prefix
-         load-manager-config
-         ensure-default-config!)
-
-(struct manager-config
-  (base-dir ini-file state-file log-file log-file-opus max-sample-rate hash-algorithm change-detection dry-run?
-            display-log? compression-level mail-enabled? mail-send-on-success?
-            mail-send-on-error? mail-host mail-port mail-tls? mail-username
-            mail-password mail-from mail-to mail-cc mail-bcc mail-subject-prefix)
-  #:transparent)
-
-(define (default-log-file base-dir)
-  (build-path base-dir ".flac-48khz-manager.log"))
-
-(define (default-ini base-dir)
-  (build-path base-dir ".flac-48khz-manager.ini"))
-
-(define (default-state base-dir)
-  (build-path base-dir ".music-info.db"))
-
-(define (ensure-default-config! ini-file)
-  (unless (file-exists? ini-file)
-    (define ini (make-ini))
-    (ini-set! ini 'manager 'max-sample-rate 48000)
-    (ini-set! ini 'manager 'hash-algorithm "sha256")
-    (ini-set! ini 'manager 'change-detection "flac-taglib")
-    (ini-set! ini 'manager 'dry-run #f)
-    (ini-set! ini 'manager 'display-log #t)
-    (ini-set! ini 'manager 'log-file ".flac-48khz-manager.log")
-    (ini-set! ini 'manager 'compression-level 5)
-    (ini-set! ini 'mail 'enabled #f)
-    (ini-set! ini 'mail 'send-on-success #f)
-    (ini-set! ini 'mail 'send-on-error #t)
-    (ini-set! ini 'mail 'host "")
-    (ini-set! ini 'mail 'port 25)
-    (ini-set! ini 'mail 'tls #f)
-    (ini-set! ini 'mail 'username "")
-    (ini-set! ini 'mail 'password "")
-    (ini-set! ini 'mail 'from "")
-    (ini-set! ini 'mail 'to "")
-    (ini-set! ini 'mail 'cc "")
-    (ini-set! ini 'mail 'bcc "")
-    (ini-set! ini 'mail 'subject-prefix "[flac-48khz-manager]")
-    (ini->file ini ini-file)))
-
-(define (resolve-log-file base-dir v)
-  (define p (string-value v ".flac-48khz-manager.log"))
-  (cond [(path-string? p)
-         (define bp (string->path p))
-         (if (absolute-path? bp) bp (build-path base-dir bp))]
-        [else (default-log-file base-dir)]))
-
-(define (load-manager-config base-dir*)
-  (define base-dir (simple-form-path base-dir*))
-  (define ini-file (default-ini base-dir))
-  (ensure-default-config! ini-file)
-  (define ini (file->ini ini-file))
-  (define log-file (resolve-log-file base-dir (ini-get ini 'manager 'log-file ".flac-48khz-manager.log")))
-  (define log-file-opus (resolve-log-file base-dir (ini-get ini 'opus-manager 'log-file ".flac2opus-manager.log")))
-  (manager-config base-dir ini-file (default-state base-dir) log-file log-file-opus
-                  (int-value (ini-get ini 'manager 'max-sample-rate 48000) 48000)
-                  (string-downcase (string-value (ini-get ini 'manager 'hash-algorithm "sha256") "sha256"))
-                  (string-downcase (string-value (ini-get ini 'manager 'change-detection "flac-taglib") "flac-taglib"))
-                  (bool-value (ini-get ini 'manager 'dry-run #f) #f)
-                  (bool-value (ini-get ini 'manager 'display-log #t) #t)
-                  (int-value (ini-get ini 'manager 'compression-level 5) 5)
-                  (bool-value (ini-get ini 'mail 'enabled #f) #f)
-                  (bool-value (ini-get ini 'mail 'send-on-success #f) #f)
-                  (bool-value (ini-get ini 'mail 'send-on-error #t) #t)
-                  (string-value (ini-get ini 'mail 'host "") "")
-                  (int-value (ini-get ini 'mail 'port 25) 25)
-                  (bool-value (ini-get ini 'mail 'tls #f) #f)
-                  (string-value (ini-get ini 'mail 'username "") "")
-                  (string-value (ini-get ini 'mail 'password "") "")
-                  (string-value (ini-get ini 'mail 'from "") "")
-                  (split-addresses (ini-get ini 'mail 'to ""))
-                  (split-addresses (ini-get ini 'mail 'cc ""))
-                  (split-addresses (ini-get ini 'mail 'bcc ""))
-                  (string-value (ini-get ini 'mail 'subject-prefix "[flac-48khz-manager]") "[flac-48khz-manager]")))
diff --git a/private/mail.rkt b/private/mail.rkt
index b782ab9..0eb93ba 100644
--- a/private/mail.rkt
+++ b/private/mail.rkt
@@ -4,7 +4,7 @@
          racket/string
          racket/tcp
          net/base64
-         "config.rkt"
+         "manager-ini.rkt"
          "report.rkt")
 
 (provide maybe-send-report-mail
@@ -113,22 +113,22 @@
      (close-input-port in)
      (close-output-port out))))
 
-(define (maybe-send-report-mail config summary errors
+(define (maybe-send-report-mail ini summary errors
                                 #:manager-name [manager-name "FLAC 48 kHz manager"]
                                 #:result-label [result-label "converted"])
   (define has-errors? (positive? (summary-ref summary 'errors 0)))
   (define should-send?
-    (and (manager-config-mail-enabled? config)
-         (not (null? (manager-config-mail-to config)))
-         (or (and has-errors? (manager-config-mail-send-on-error? config))
-             (and (not has-errors?) (manager-config-mail-send-on-success? config)))))
+    (and (ini-ref/bool ini 'mail 'enabled #f)
+         (not (null? (ini-ref/addresses ini 'mail 'to "")))
+         (or (and has-errors? (ini-ref/bool ini 'mail 'send-on-error #t))
+             (and (not has-errors?) (ini-ref/bool ini 'mail 'send-on-success #f)))))
   (when should-send?
-    (define from (mail-address->envelope-address (manager-config-mail-from config)))
-    (define to (clean-address-list (manager-config-mail-to config)))
-    (define cc (clean-address-list (manager-config-mail-cc config)))
-    (define bcc (clean-address-list (manager-config-mail-bcc config)))
+    (define from (mail-address->envelope-address (ini-ref/string ini 'mail 'from "")))
+    (define to (clean-address-list (ini-ref/addresses ini 'mail 'to "")))
+    (define cc (clean-address-list (ini-ref/addresses ini 'mail 'cc "")))
+    (define bcc (clean-address-list (ini-ref/addresses ini 'mail 'bcc "")))
     (define subject (format "~a ~a: ~a error(s), ~a ~a"
-                            (manager-config-mail-subject-prefix config)
+                            (ini-ref/string ini 'mail 'subject-prefix "[flac-48khz-manager]")
                             manager-name
                             (summary-ref summary 'errors 0)
                             (summary-ref summary 'converted 0)
@@ -142,8 +142,8 @@
                             #:bcc bcc
                             #:body-content-type "text/html"))
     (strict-send-smtp-mail mail
-                           #:host (string-trim (manager-config-mail-host config))
-                           #:port (manager-config-mail-port config)
-                           #:tls-encode (manager-config-mail-tls? config)
-                           #:username (string-trim (manager-config-mail-username config))
-                           #:password (manager-config-mail-password config))))
+                           #:host (string-trim (ini-ref/string ini 'mail 'host ""))
+                           #:port (ini-ref/int ini 'mail 'port 25)
+                           #:tls-encode (ini-ref/bool ini 'mail 'tls #f)
+                           #:username (string-trim (ini-ref/string ini 'mail 'username ""))
+                           #:password (ini-ref/string ini 'mail 'password ""))))
diff --git a/private/manager-ini.rkt b/private/manager-ini.rkt
new file mode 100644
index 0000000..e5ec5fb
--- /dev/null
+++ b/private/manager-ini.rkt
@@ -0,0 +1,77 @@
+#lang racket/base
+
+(require racket/file
+         racket/path
+         simple-ini
+         "util.rkt")
+
+(provide manager-ini-file
+         manager-state-file
+         ensure-default-manager-ini!
+         load-manager-ini
+         ini-ref/bool
+         ini-ref/int
+         ini-ref/string
+         ini-ref/path
+         ini-ref/addresses)
+
+(define (manager-ini-file base-dir*)
+  (build-path (filesystem-path base-dir*) ".flac-48khz-manager.ini"))
+
+(define (manager-state-file base-dir*)
+  (build-path (filesystem-path base-dir*) ".music-info.db"))
+
+(define (ensure-default-manager-ini! ini-file)
+  (unless (file-exists? ini-file)
+    (define ini (make-ini))
+    (ini-set! ini 'manager 'max-sample-rate 48000)
+    (ini-set! ini 'manager 'hash-algorithm "sha256")
+    (ini-set! ini 'manager 'change-detection "flac-taglib")
+    (ini-set! ini 'manager 'dry-run #f)
+    (ini-set! ini 'manager 'display-log #t)
+    (ini-set! ini 'manager 'log-file ".flac-48khz-manager.log")
+    (ini-set! ini 'manager 'compression-level 5)
+    (ini-set! ini 'opus-manager 'log-file ".flac2opus-manager.log")
+    (ini-set! ini 'mail 'enabled #f)
+    (ini-set! ini 'mail 'send-on-success #f)
+    (ini-set! ini 'mail 'send-on-error #t)
+    (ini-set! ini 'mail 'host "")
+    (ini-set! ini 'mail 'port 25)
+    (ini-set! ini 'mail 'tls #f)
+    (ini-set! ini 'mail 'username "")
+    (ini-set! ini 'mail 'password "")
+    (ini-set! ini 'mail 'from "")
+    (ini-set! ini 'mail 'to "")
+    (ini-set! ini 'mail 'cc "")
+    (ini-set! ini 'mail 'bcc "")
+    (ini-set! ini 'mail 'subject-prefix "[flac-48khz-manager]")
+    (ini->file ini ini-file)))
+
+(define (load-manager-ini base-dir*)
+  (define ini-file (manager-ini-file base-dir*))
+  (ensure-default-manager-ini! ini-file)
+  (file->ini ini-file))
+
+(define (ini-ref/bool ini section key default)
+  (bool-value (ini-get ini section key default) default))
+
+(define (ini-ref/int ini section key default)
+  (int-value (ini-get ini section key default) default))
+
+(define (ini-ref/string ini section key default)
+  (string-value (ini-get ini section key default) default))
+
+(define (resolve-ini-path base-dir v default)
+  (define p (string-value v default))
+  (cond [(path-string? p)
+         (define bp (string->path p))
+         (if (absolute-path? bp) bp (build-path base-dir bp))]
+        [else (build-path base-dir default)]))
+
+(define (ini-ref/path ini base-dir section key default)
+  (resolve-ini-path (filesystem-path base-dir)
+                    (ini-get ini section key default)
+                    default))
+
+(define (ini-ref/addresses ini section key default)
+  (split-addresses (ini-get ini section key default)))
diff --git a/scribblings/audio-library-manager.scrbl b/scribblings/audio-library-manager.scrbl
index cfdfeef..f730cb1 100644
--- a/scribblings/audio-library-manager.scrbl
+++ b/scribblings/audio-library-manager.scrbl
@@ -70,8 +70,7 @@ implementation.
 
 @section{Configuration}
 
-The configuration file is created automatically when it does not exist. The main
-settings are:
+The configuration file is created automatically when it does not exist. The managers read it directly as sections and keys through @racketmodname[simple-ini]; there is no separate configuration struct layered on top of the ini model. The main settings are:
 
 @verbatim{
 [manager]
@@ -83,6 +82,9 @@ display-log=#t
 log-file=".flac-48khz-manager.log"
 compression-level=5
 
+[opus-manager]
+log-file=".flac2opus-manager.log"
+
 [mail]
 enabled=#f
 send-on-success=#f