diff --git a/src/audio/eq_iir/tune/sof_eq_blob_plot.m b/src/audio/eq_iir/tune/sof_eq_blob_plot.m
index cb096e863a6e..369c311fc96f 100644
--- a/src/audio/eq_iir/tune/sof_eq_blob_plot.m
+++ b/src/audio/eq_iir/tune/sof_eq_blob_plot.m
@@ -26,13 +26,13 @@
 
 % SPDX-License-Identifier: BSD-3-Clause
 %
-% Copyright (c) 2016-2022, Intel Corporation. All rights reserved.
+% Copyright (c) 2016-2025, Intel Corporation.
 %
 % Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
 
 %% Handle input parameters
 if nargin < 2
-	if findstr(blobfn, '_fir_')
+	if strfind(blobfn, '_fir')
 		eqtype = 'FIR';
 	else
 		eqtype = 'IIR';
diff --git a/src/audio/eq_iir/tune/sof_eq_blob_read.m b/src/audio/eq_iir/tune/sof_eq_blob_read.m
index d95613507c91..424e8c74ad93 100644
--- a/src/audio/eq_iir/tune/sof_eq_blob_read.m
+++ b/src/audio/eq_iir/tune/sof_eq_blob_read.m
@@ -2,17 +2,18 @@
 
 % SPDX-License-Identifier: BSD-3-Clause
 %
-% Copyright (c) 2020, Intel Corporation. All rights reserved.
+% Copyright (c) 2020-2025, Intel Corporation.
 %
 % Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
 
 %% Use file suffix as type
 if nargin < 2
-	idx = findstr(blobfn, '.');
+	idx = strfind(blobfn, '.');
 	fntype = blobfn(idx(end)+1:end);
 end
 
 %% Read the file
+add_tlv_header = false;
 switch lower(fntype)
 	case 'bin'
 		fh = fopen(blobfn, 'rb');
@@ -23,13 +24,21 @@
 		tmp = fscanf(fh, '%u,', Inf);
 		fclose(fh);
 	case 'm4'
+		% The blobs in topology are without TLV header. For simplicity
+		% add to beginning two 32 bit words (zeros) to be compatible
+		% with other blob formats.
 		tmp = get_parse_m4(blobfn);
+		add_tlv_header = true;
 	otherwise
 		error('Illegal file type, please give fntype argument');
 
 end
 
-blob = uint32(tmp);
+if add_tlv_header
+	blob = uint32([0 0 tmp']');
+else
+	blob = uint32(tmp);
+end
 
 end
 
@@ -46,7 +55,7 @@
 n = 1;
 ln = fgets(fh);
 while ln ~= -1
-	idx = findstr(ln, '0x');
+	idx = strfind(ln, '0x');
 	for i = 1:length(idx)
 		bytes(n) = hex2dec(ln(idx(i)+2:idx(i)+3));
 		n = n + 1;
diff --git a/src/audio/eq_iir/tune/sof_mls_freq_resp.m b/src/audio/eq_iir/tune/sof_mls_freq_resp.m
index 8376325c69a1..a30864d93a3b 100644
--- a/src/audio/eq_iir/tune/sof_mls_freq_resp.m
+++ b/src/audio/eq_iir/tune/sof_mls_freq_resp.m
@@ -22,7 +22,7 @@
 
 % SPDX-License-Identifier: BSD-3-Clause
 %
-% Copyright (c) 2018-2020, Intel Corporation. All rights reserved.
+% Copyright (c) 2018-2025, Intel Corporation.
 %
 % Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
 
@@ -332,12 +332,12 @@ function remote_capture(fn, cfg, t)
 	sens =[];
 	desc = '';
 	str = fgets(fh);
-	idx = findstr(str, '"');
+	idx = strfind(str, '"');
 	while length(idx) > 0
 		line = str(idx(1)+1:idx(2)-1);
 		desc = sprintf('%s%s ', desc, line);
 		str = fgets(fh);
-		idx = findstr(str, '"');
+		idx = strfind(str, '"');
 	end
 	if length(strfind(str, 'Sens'))
 		desc = str;